| firelighter | (noun) (a piece of) a substance that burns easily and can be used to start a coal or coke fire | - |
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| firelock | (noun) a muzzle loader that had a flintlock type of gunlock | Synonyms: flintlock |
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| fireman | (noun) play in which children pretend to put out a fire | - |
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| (noun) a member of a fire department who tries to extinguish fires | Synonyms: fire-eater, fire fighter, firefighter |
| (noun) a laborer who tends fires (as on a coal-fired train or steamship) | Synonyms: stoker |
| (noun) a pitcher who does not start the game | Synonyms: relief pitcher, reliever |
| fireplace | (noun) an open recess in a wall at the base of a chimney where a fire can be built | Synonyms: hearth, open fireplace |
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| fireplug | (noun) an upright hydrant for drawing water to use in fighting a fire | Synonyms: fire hydrant, plug |
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| firepower | (noun) (military) the relative capacity for delivering fire on a target | - |
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| fireproof | (adjective) impervious to damage by fire | - |
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| (verb) make resistant to fire | - |
| fireroom | (noun) (nautical) chamber or compartment in which the furnaces of a ship are stoked or fired | Synonyms: stokehold, stokehole |
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| fireside | (noun) home symbolized as a part of the fireplace | Synonyms: hearth |
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| (noun) an area near a fireplace (usually paved and extending out into a room) | Synonyms: hearth |
| firestone | (noun) a sandstone that withstands intense heat; used to line fireplaces and furnaces and kilns | - |
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| (noun) a piece of flint that is struck to light a fire | - |
| firestorm | (noun) an outburst of controversy | - |
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| (noun) a storm in which violent winds are drawn into the column of hot air rising over a severely bombed area | - |
| firethorn | (noun) any of various thorny shrubs of the genus Pyracantha bearing small white flowers followed by hard red or orange-red berries | Synonyms: fire thorn, pyracanth, Pyracantha |
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| firetrap | (noun) a building that would be hard to escape from if it were to catch fire | - |
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| firewall | (noun) (colloquial) the application of maximum thrust | - |
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| (noun) a fireproof (or fire-resistant) wall designed to prevent the spread of fire through a building or a vehicle | - |
| (noun) (computing) a security system consisting of a combination of hardware and software that limits the exposure of a computer or computer network to attack from crackers; commonly used on local area networks that are connected to the internet | - |
| firewater | (noun) any strong spirits (such as strong whisky or rum) | - |
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| fireweed | (noun) tall North American perennial with creeping rootstocks and narrow leaves and spikes of pinkish-purple flowers occurring in great abundance in burned-over areas or recent clearings; an important honey plant | Synonyms: Epilobium angustifolium, giant willowherb, rosebay willowherb, wickup |
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| (noun) an American weedy plant with small white or greenish flowers | Synonyms: Erechtites hieracifolia |
| firewood | (noun) wood used for fuel | - |
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| firework | (noun) (usually plural) a device with an explosive that burns at a low rate and with colored flames; can be used to illuminate areas or send signals etc. | Synonyms: pyrotechnic |
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| grassfire | (noun) an uncontrolled fire in a grassy area | Synonyms: prairie fire |
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| grimoire | (noun) a manual of black magic (for invoking spirits and demons) | - |
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| gunfire | (noun) the act of shooting a gun | Synonyms: gunshot |
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| haired | (adjective) having or covered with hair | Synonyms: hairy, hirsute |
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| haywire | (adjective) informal or slang terms for mentally irregular | Synonyms: around the bend, balmy, barmy, bats, batty, bonkers, buggy, cracked, crackers, daft, dotty, fruity, kookie, kooky, loco, loony, loopy, nuts, nutty, round the bend, wacky, whacky |
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| (adjective) not functioning properly | Synonyms: amiss, awry, wrong |
| (noun) wire for tying up bales of hay | - |
| heiress | (noun) a female heir | Synonyms: inheritress, inheritrix |
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| hellfire | (noun) a place of eternal fire envisaged as punishment for the damned | Synonyms: red region |
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| hire | (noun) the act of hiring something or someone | - |
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| (noun) a newly hired employee | - |
| (verb) engage for service under a term of contract | Synonyms: charter, engage, lease, rent, take |
| (verb) engage or hire for work | Synonyms: employ, engage |
| (verb) hold under a lease or rental agreement; of goods and services | Synonyms: charter, lease, rent |
| hired | (adjective) hired for the exclusive temporary use of a group of travelers | Synonyms: chartered, leased |
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| (adjective) having services engaged for a fee | - |
| hireling | (noun) a person who works only for money | Synonyms: pensionary |
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| hirer | (noun) a person responsible for hiring workers | Synonyms: boss |
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| impaired | (adjective) diminished in strength, quality, or utility | - |
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| (adjective) mentally or physically unfit | Synonyms: afflicted |
| impairer | (noun) an agent that impairs | - |
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| indirect | (adjective) not direct in spatial dimension; not leading by a straight line or course to a destination | - |
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| (adjective) extended senses; not direct in manner or language or behavior or action | - |
| (adjective) descended from a common ancestor but through different lines | Synonyms: collateral |
| (adjective) having intervening factors or persons or influences | - |
| (adjective) not as a direct effect or consequence | - |
| indirection | (noun) indirect procedure or action | - |
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| (noun) deceitful action that is not straightforward | - |
| indirectly | (adverb) not in a forthright manner | - |
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| indirectness | (noun) having the characteristic of lacking a true course toward a goal | - |
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| inquire | (verb) have a wish or desire to know something | Synonyms: enquire, wonder |
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| (verb) address a question to and expect an answer from | Synonyms: ask, enquire |
| (verb) conduct an inquiry or investigation of | Synonyms: enquire, investigate |
| inquirer | (noun) someone who asks a question | Synonyms: asker, enquirer, querier, questioner |
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| inspire | (verb) draw in (air) | Synonyms: breathe in, inhale |
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| (verb) fill with revolutionary ideas | Synonyms: revolutionise, revolutionize |
| (verb) serve as the inciting cause of | Synonyms: instigate, prompt |
| (verb) spur on or encourage especially by cheers and shouts | Synonyms: barrack, cheer, exhort, pep up, root on, urge, urge on |
| (verb) supply the inspiration for | - |
| (verb) heighten or intensify | Synonyms: animate, enliven, exalt, invigorate |
| inspired | (adjective) being of such surpassing excellence as to suggest inspiration by the gods | Synonyms: divine, elysian |
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| inspirer | (noun) a leader who stimulates and excites people to action | Synonyms: galvaniser, galvanizer |
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| ire | (noun) belligerence aroused by a real or supposed wrong (personified as one of the deadly sins) | Synonyms: anger, ira, wrath |
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| (noun) a strong emotion; a feeling that is oriented toward some real or supposed grievance | Synonyms: anger, choler |
| ireful | (adjective) feeling or showing extreme anger | Synonyms: irate |
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| irenic | (adjective) conducive to peace | - |
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| legionnaire | (noun) a soldier who is a member of a legion (especially the French Foreign Legion) | Synonyms: legionary |
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| luminaire | (noun) an electrical device used to create artificial light by use of an electric lamp; all light fixtures have a fixture body and a light socket to hold the lamp and allow for its replacement | Synonyms: light fitting, light fixture |
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| millionaire | (noun) a person whose material wealth is valued at more than a million dollars | - |
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| millionairess | (noun) a woman millionaire | - |
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| millirem | (noun) a dosage of ionizing radiation equivalent to one thousandth (1/1000) of a rem | Synonyms: mrem |
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| mire | (noun) a soft wet area of low-lying land that sinks underfoot | Synonyms: morass, quag, quagmire, slack |
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| (noun) a difficulty or embarrassment that is hard to extricate yourself from | - |
| (noun) deep soft mud in water or slush | Synonyms: slop |
| (verb) soil with mud, muck, or mire | Synonyms: muck, muck up, mud |
| (verb) be unable to move further | Synonyms: bog down, get stuck, grind to a halt |
| (verb) cause to get stuck as if in a mire | Synonyms: bog down |
| (verb) entrap | Synonyms: entangle |
| mired | (adjective) entangled or hindered as if e.g. in mire | Synonyms: involved |
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| misdirect | (verb) put a wrong address on | Synonyms: misaddress |
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| (verb) lead someone in the wrong direction or give someone wrong directions | Synonyms: lead astray, misguide, mislead |
| (verb) corrupt morally or by intemperance or sensuality | Synonyms: corrupt, debase, debauch, demoralise, demoralize, deprave, pervert, profane, subvert, vitiate |
| misdirection | (noun) management that is careless or inefficient | Synonyms: mismanagement |
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| (noun) the act of distracting; drawing someone's attention away from something | Synonyms: distraction |
| (noun) incorrect directions or instructions | - |
| (noun) an incorrect charge to a jury given by a judge | - |
| misfire | (noun) an explosion that fails to occur | Synonyms: dud |
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| (noun) a failure to hit (or meet or find etc) | Synonyms: miss |
| (verb) fail to fire or detonate | - |
| moire | (adjective) (of silk fabric) having a wavelike pattern | Synonyms: watered |
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| (noun) silk fabric with a wavy surface pattern | Synonyms: watered-silk |
| omnidirectional | (adjective) not directional | - |
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| overtire | (verb) tire excessively | Synonyms: overfatigue, overweary |
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| paired | (adjective) of leaves etc; growing in pairs on either side of a stem | Synonyms: opposite |
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| (adjective) occurring in pairs or as a pair | Synonyms: mated |
| (adjective) matched for breeding | - |
| perspire | (verb) excrete perspiration through the pores in the skin | Synonyms: sudate, sweat |
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| perspirer | (noun) a person who perspires | Synonyms: sweater |
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| pismire | (noun) social insect living in organized colonies; characteristically the males and fertile queen have wings during breeding season; wingless sterile females are the workers | Synonyms: ant, emmet |
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| pourboire | (noun) a relatively small amount of money given for services rendered (as by a waiter) | Synonyms: backsheesh, baksheesh, bakshis, bakshish, gratuity, tip |
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| protirelin | (noun) hormone released by the hypothalamus that controls the release of thyroid-stimulating hormone from the anterior pituitary | Synonyms: thyrotropin-releasing factor, thyrotropin-releasing hormone, TRF, TRH |
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| quagmire | (noun) a soft wet area of low-lying land that sinks underfoot | Synonyms: mire, morass, quag, slack |
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| questionnaire | (noun) a form containing a set of questions; submitted to people to gain statistical information | - |
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| quire | (noun) a quantity of paper; 24 or 25 sheets | - |
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| redirect | (verb) channel into a new direction | Synonyms: airt |
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| repairer | (noun) a skilled worker who mends or repairs things | Synonyms: fixer, mender |
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| repertoire | (noun) a collection of works (plays, songs, operas, ballets) that an artist or company can perform and do perform for short intervals on a regular schedule | Synonyms: repertory |
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| (noun) the entire range of skills or aptitudes or devices used in a particular field or occupation | Synonyms: repertory |
| require | (verb) make someone do something | Synonyms: command |
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| (verb) consider obligatory; request and expect | Synonyms: ask, expect |
| (verb) have need of | Synonyms: need, want |
| (verb) require as useful, just, or proper | Synonyms: ask, call for, demand, involve, necessitate, need, postulate, take |
| required | (adjective) necessary for relief or supply | Synonyms: needed, needful, requisite |
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| (adjective) required by rule | Synonyms: compulsory, mandatory |
| requirement | (noun) something that is required in advance | Synonyms: prerequisite |
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| (noun) required activity | Synonyms: demand |
| (noun) anything indispensable | Synonyms: essential, necessary, necessity, requisite |
| respire | (verb) draw air into, and expel out of, the lungs | Synonyms: breathe, suspire, take a breath |
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| (verb) undergo the biomedical and metabolic processes of respiration by taking up oxygen and producing carbon monoxide | - |
| (verb) breathe easily again, as after exertion or anxiety | - |
| retire | (verb) prepare for sleep | Synonyms: bed, crawl in, go to bed, go to sleep, hit the hay, hit the sack, kip down, sack out, turn in |
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| (verb) cause to get out | Synonyms: strike out |
| (verb) cause to be out on a fielding play | Synonyms: put out |
| (verb) lose interest | Synonyms: withdraw |
| (verb) pull back or move away or backward | Synonyms: draw back, move back, pull away, pull back, recede, retreat, withdraw |
| (verb) dispose of (something no longer useful or needed) | - |
| (verb) break from a meeting or gathering | Synonyms: adjourn, withdraw |
| (verb) go into retirement; stop performing one's work or withdraw from one's position | - |
| (verb) withdraw from active participation | Synonyms: withdraw |
| (verb) make (someone) retire | - |
| (verb) withdraw from circulation or from the market, as of bills, shares, and bonds | - |
| retired | (adjective) no longer active in your work or profession | - |
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| retiree | (noun) someone who has retired from active working | Synonyms: retired person |
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| retirement | (noun) withdrawal from your position or occupation | - |
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| (noun) withdrawal for prayer and study and meditation | Synonyms: retreat |
| (noun) the state of being retired from one's business or occupation | - |
| rewire | (verb) provide with new wiring | - |
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| saltire | (noun) a cross resembling the letter x, with diagonal bars of equal length | Synonyms: St. Andrew's cross |
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| samphire | (noun) fleshy maritime plant having fleshy stems with rudimentary scalelike leaves and small spikes of minute flowers; formerly used in making glass | Synonyms: glasswort, Salicornia europaea |
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| sapphire | (adjective) of something having the color of a blue sapphire | - |
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| (noun) a light shade of blue | Synonyms: azure, cerulean, lazuline, sky-blue |
| (noun) a transparent piece of sapphire that has been cut and polished and is valued as a precious gem | - |
| (noun) a precious transparent stone of rich blue corundum valued as a gemstone | - |
| satire | (noun) witty language used to convey insults or scorn | Synonyms: caustic remark, irony, sarcasm |
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| (noun) a genre of literature and performing arts, in which shortcomings are held up to ridicule, ideally with the intent of shaming others | - |
| secretaire | (noun) a desk used for writing | Synonyms: escritoire, secretary, writing table |
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| shellfire | (noun) shooting artillery shells | - |
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| shire | (noun) British breed of large heavy draft horse | Synonyms: shire horse |
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| (noun) a former administrative district of England; equivalent to a county | - |
| sire | (noun) male parent of an animal especially a domestic animal such as a horse | - |
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| (noun) the founder of a family | Synonyms: father, forefather |
| (noun) a title of address formerly used for a man of rank and authority | - |
| (verb) make (offspring) by reproduction | Synonyms: beget, bring forth, engender, father, generate, get, mother |
| siren | (noun) eellike aquatic North American salamander with small forelimbs and no hind limbs; have permanent external gills | - |
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| (noun) an acoustic device producing a loud often wailing sound as a signal or warning | - |
| (noun) a warning signal that is a loud wailing sound | - |
| (noun) a woman who is considered to be dangerously seductive | Synonyms: Delilah, enchantress, femme fatale, temptress |
| sirenian | (noun) any of two families of large herbivorous aquatic mammals with paddle-shaped tails and flipper-like forelimbs and no hind limbs | Synonyms: sea cow, sirenian mammal |
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| soiree | (noun) a party of people assembled in the evening (usually at a private house) | - |
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| solitaire | (noun) a card game played by one person | Synonyms: patience |
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| (noun) a dull grey North American thrush noted for its beautiful song | - |
| (noun) extinct flightless bird related to the dodo | Synonyms: Pezophaps solitaria |
| (noun) a gem (usually a diamond) in a setting by itself | - |
| spire | (noun) a tall tower that forms the superstructure of a building (usually a church or temple) and that tapers to a point at the top | Synonyms: steeple |
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| spirea | (noun) any rosaceous plant of the genus Spiraea; has sprays of small white or pink flowers | Synonyms: spiraea |
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| (noun) a Japanese shrub that resembles members of the genus Spiraea; widely cultivated in many varieties for its dense panicles of flowers in many colors; often forced by florists for Easter blooming | Synonyms: Astilbe japonica, spiraea |
| spitfire | (noun) a highly emotional and quick-tempered person (especially a girl or woman) | - |
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| squire | (noun) an English country landowner | - |
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| (noun) young nobleman attendant on a knight | - |
| (noun) a man who attends or escorts a woman | Synonyms: gallant |
| (verb) attend upon as a squire; serve as a squire | - |
| squirearchy | (noun) the gentry who own land (considered as a class) | Synonyms: landed gentry |
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| subdirectory | (noun) (computer science) a directory that is listed in another directory | - |
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| suspire | (verb) draw air into, and expel out of, the lungs | Synonyms: breathe, respire, take a breath |
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| (verb) heave or utter a sigh; breathe deeply and heavily | Synonyms: sigh |
| tire | (noun) hoop that covers a wheel | Synonyms: tyre |
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| (verb) lose interest or become bored with something or somebody | Synonyms: fatigue, jade, pall, weary |
| (verb) exhaust or get tired through overuse or great strain or stress | Synonyms: fag, fag out, fatigue, jade, outwear, tire out, wear, wear down, wear out, wear upon, weary |
| (verb) cause to be bored | Synonyms: bore |
| (verb) deplete | Synonyms: exhaust, play out, run down, sap |
| tired | (adjective) depleted of strength or energy | - |
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| (adjective) repeated too often; overfamiliar through overuse | Synonyms: banal, commonplace, hackneyed, old-hat, shopworn, stock, threadbare, timeworn, trite, well-worn |
| tiredly | (adverb) in a weary manner | Synonyms: wearily |
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| tiredness | (noun) temporary loss of strength and energy resulting from hard physical or mental work | Synonyms: fatigue, weariness |
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