| arced | (adjective) forming or resembling an arch | Synonyms: arched, arching, arciform, arcuate, bowed |
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| arched | (adjective) constructed with or in the form of an arch or arches | - |
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| (adjective) forming or resembling an arch | Synonyms: arced, arching, arciform, arcuate, bowed |
| archiannelid | (noun) small primitive marine worm lacking external segmentation and resembling polychaete larvae | - |
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| arcsecond | (noun) a 60th part of a minute of arc | Synonyms: second |
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| arctiid | (noun) stout-bodied broad-winged moth with conspicuously striped or spotted wings; larvae are hairy caterpillars | Synonyms: arctiid moth |
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| ard | (noun) a simple light plough without a mouldboard. | Synonyms: ard plough, scratch plough |
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| argasid | (noun) tick lacking a dorsal shield and having mouth parts on the under side of the head | Synonyms: soft tick |
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| arid | (adjective) lacking sufficient water or rainfall | Synonyms: waterless |
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| (adjective) lacking vitality or spirit; lifeless | Synonyms: desiccate, desiccated |
| ariled | (adjective) (of some seeds) having a fleshy and usually brightly colored cover | Synonyms: arillate |
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| armband | (noun) a band worn around the upper arm | - |
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| (noun) worn around arm as identification or to indicate mourning | - |
| armed | (adjective) (used of persons or the military) characterized by having or bearing arms | - |
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| (adjective) (used of plants and animals) furnished with bristles and thorns | - |
| (adjective) having arms or arms as specified; used especially in combination | - |
| armguard | (noun) a protective covering for the wrist or arm that is used in archery and fencing and other sports | Synonyms: bracer |
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| armored | (adjective) protected by armor (used of persons or things military) | Synonyms: armoured |
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| (adjective) used of animals; provided with protective covering | Synonyms: armoured |
| (adjective) equipped with the complete arms and armor of a warrior | Synonyms: panoplied |
| armoured | (adjective) protected by armor (used of persons or things military) | Synonyms: armored |
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| (adjective) used of animals; provided with protective covering | Synonyms: armored |
| aroid | (adjective) relating to a plant of the family Araceae | Synonyms: araceous |
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| (noun) any plant of the family Araceae; have small flowers massed on a spadix surrounded by a large spathe | Synonyms: arum |
| around | (adverb) in circumference | - |
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| (adverb) in the area or vicinity | Synonyms: about |
| (adverb) from beginning to end; throughout | Synonyms: round |
| (adverb) (of quantities) imprecise but fairly close to correct | Synonyms: about, approximately, close to, just about, more or less, or so, roughly, some |
| (adverb) used of movement to or among many different places or in no particular direction | Synonyms: about |
| (adverb) by a circular or circuitous route | - |
| (adverb) in a circle or circular motion | - |
| (adverb) all around or on all sides | Synonyms: about |
| (adverb) to a particular destination either specified or understood | - |
| (adverb) in or to a reversed position or direction | Synonyms: about |
| aroused | (adjective) (of persons) excessively affected by emotion | Synonyms: emotional, excited, worked up |
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| (adjective) aroused to action | - |
| (adjective) emotionally aroused | Synonyms: stimulated, stirred, stirred up |
| (adjective) keenly excited (especially sexually) or indicating excitement | Synonyms: ablaze, aflame |
| (adjective) feeling great sexual desire | Synonyms: horny, randy, ruttish, steamy, turned on |
| (adjective) brought to a state of great tension | Synonyms: wound up |
| arranged | (adjective) disposed or placed in a particular kind of order | Synonyms: ordered |
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| (adjective) deliberately arranged for effect | Synonyms: staged |
| (adjective) organized or planned for | - |
| arrayed | (adjective) in ceremonial attire and paraphernalia | Synonyms: panoplied |
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| arrowhead | (noun) the pointed head or striking tip of an arrow | - |
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| arthropod | (noun) invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitin | - |
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| articled | (adjective) bound by contract | Synonyms: apprenticed, bound, indentured |
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| articulated | (adjective) consisting of segments held together by joints | Synonyms: articulate |
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| arytaenoid | (noun) either of two small cartilages at the back of the larynx to which the vocal folds are attached | Synonyms: arytenoid, arytenoid cartilage |
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| arytenoid | (noun) either of two small cartilages at the back of the larynx to which the vocal folds are attached | Synonyms: arytaenoid, arytenoid cartilage |
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| ascend | (verb) slope upwards | - |
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| (verb) travel up | Synonyms: go up |
| (verb) come up, of celestial bodies | Synonyms: come up, rise, uprise |
| (verb) go along towards (a river's) source | - |
| (verb) move to a better position in life or to a better job | Synonyms: move up, rise |
| (verb) appear to be moving upward, as by means of tendrils | Synonyms: climb up |
| (verb) become king or queen | - |
| (verb) go back in order of genealogical succession | - |
| ascertained | (adjective) discovered or determined by scientific observation | Synonyms: discovered, observed |
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| asclepiad | (noun) any plant of the family Asclepiadaceae | - |
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| ashamed | (adjective) feeling shame or guilt or embarrassment or remorse | - |
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| asphyxiated | (adjective) in a state of asphyxia | - |
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| assassinated | (adjective) murdered by surprise attack for political reasons | - |
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| asserted | (adjective) confidently declared to be so | - |
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| assigned | (adjective) appointed to a post or duty | - |
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| assisted | (adjective) having help; often used as a combining form | Synonyms: aided |
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| assorted | (adjective) of many different kinds purposefully arranged but lacking any uniformity | Synonyms: various |
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| (adjective) consisting of a haphazard assortment of different kinds | Synonyms: miscellaneous, mixed, motley, sundry |
| assumed | (adjective) adopted in order to deceive | Synonyms: false, fictitious, fictive, pretended, put on, sham |
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| assured | (adjective) marked by assurance; exhibiting confidence | - |
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| (adjective) characterized by certainty or security | - |
| asteriated | (adjective) (of some crystals especially gemstones) exhibiting asterism | - |
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| asterisked | (adjective) marked with an asterisk | Synonyms: starred |
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| asteroid | (adjective) shaped like a star | Synonyms: star-shaped |
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| (noun) any of numerous small celestial bodies composed of rock and metal that move around the sun (mainly between the orbits of Mars and Jupiter) | - |
| astonied | (adjective) filled with the emotional impact of overwhelming surprise or shock | Synonyms: amazed, astonished, astounded, stunned |
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| astonished | (adjective) filled with the emotional impact of overwhelming surprise or shock | Synonyms: amazed, astonied, astounded, stunned |
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| astound | (verb) affect with wonder | Synonyms: amaze, astonish |
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| astounded | (adjective) filled with the emotional impact of overwhelming surprise or shock | Synonyms: amazed, astonied, astonished, stunned |
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| athodyd | (noun) a simple type of jet engine; must be launched at high speed | Synonyms: atherodyde, flying drainpipe, ramjet, ramjet engine |
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| atrophied | (adjective) (of an organ or body part) diminished in size or strength as a result of disease or injury or lack of use | Synonyms: diminished, wasted |
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| attached | (adjective) associated in an exclusive sexual relationship | Synonyms: committed |
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| (adjective) used of buildings joined by common sidewalls | - |
| (adjective) fond and affectionate | - |
| (adjective) being joined in close association | Synonyms: affiliated, connected |
| attained | (adjective) achieved or reached | - |
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| attempted | (adjective) tried unsuccessfully | - |
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| attend | (verb) give heed (to) | Synonyms: advert, give ear, hang, pay heed |
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| (verb) work for, or be a servant to | Synonyms: assist, attend to, serve, wait on |
| (verb) take charge of or deal with | Synonyms: look, see, take care |
| (verb) be present at (meetings, church services, university), etc. | Synonyms: go to |
| (verb) to accompany as a circumstance or follow as a result | - |
| attended | (adjective) playing or singing with instrumental or vocal accompaniment | Synonyms: accompanied |
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| (adjective) having a caretaker or other watcher | Synonyms: tended to |
| attenuated | (adjective) reduced in strength | Synonyms: attenuate, faded, weakened |
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| (adjective) of an electrical signal; reduced in amplitude with little or no distortion | - |
| attested | (adjective) established as genuine | Synonyms: authenticated, documented |
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| attired | (adjective) dressed or clothed especially in fine attire; often used in combination | Synonyms: appareled, dressed, garbed, garmented, habilimented, robed |
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| attosecond | (noun) one quintillionth (10^-18) of a second; one thousandth of a femtosecond | - |
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| attrited | (adjective) worn by rubbing or friction | - |
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| audad | (noun) wild sheep of northern Africa | Synonyms: Ammotragus lervia, aoudad, arui, Barbary sheep, maned sheep |
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| augend | (noun) a number to which another number (the addend) is added | - |
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| augmented | (adjective) added to or made greater in amount or number or strength | - |
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| auld | (adjective) a Scottish word | - |
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| auriculated | (adjective) having auricles | Synonyms: auriculate |
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| autacoid | (noun) any physiologically active internal secretion especially one of uncertain classification | Synonyms: autocoid |
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| authenticated | (adjective) established as genuine | Synonyms: attested, documented |
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| authorised | (adjective) endowed with authority | Synonyms: authoritative, authorized |
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| authorized | (adjective) endowed with authority | Synonyms: authorised, authoritative |
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| autocoid | (noun) any physiologically active internal secretion especially one of uncertain classification | Synonyms: autacoid |
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| autographed | (adjective) bearing an autograph | - |
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| automated | (adjective) operated by automation | Synonyms: machine-controlled, machine-driven |
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| avenged | (adjective) for which vengeance has been taken | - |
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| avid | (adjective) (often followed by `for') ardently or excessively desirous | Synonyms: devouring, esurient, greedy |
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| (adjective) marked by active interest and enthusiasm | Synonyms: zealous |
| avoid | (verb) stay clear from; keep away from; keep out of the way of someone or something | - |
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| (verb) refrain from certain foods or beverages | Synonyms: keep off |
| (verb) declare invalid | Synonyms: annul, invalidate, nullify, quash, void |
| (verb) prevent the occurrence of; prevent from happening; to protect from or to keep away anything undesirable; to ward off | Synonyms: avert, debar, deflect, fend off, forefend, forfend, head off, obviate, stave off, ward off |
| (verb) refrain from doing something | - |
| avowed | (adjective) openly declared as such | Synonyms: professed |
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| awaited | (adjective) expected hopefully | Synonyms: anticipated, hoped-for |
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| awakened | (adjective) aroused or activated | - |
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| (adjective) (somewhat formal) having been waked up | - |
| award | (noun) a grant made by a law court | Synonyms: awarding |
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| (noun) a tangible symbol signifying approval or distinction | Synonyms: accolade, honor, honour, laurels |
| (noun) something given for victory or superiority in a contest or competition or for winning a lottery | Synonyms: prize |
| (verb) give, especially as an honor or reward | Synonyms: present |
| (verb) give as judged due or on the basis of merit | Synonyms: grant |
| awed | (adjective) having or showing a feeling of mixed reverence and respect and wonder and dread | Synonyms: awestricken, awestruck |
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| (adjective) inspired by a feeling of fearful wonderment or reverence | Synonyms: awful |
| awkward | (adjective) lacking grace or skill in manner or movement or performance | - |
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| (adjective) hard to deal with; especially causing pain or embarrassment | Synonyms: embarrassing, sticky, unenviable |
| (adjective) causing inconvenience | - |
| (adjective) not elegant or graceful in expression | Synonyms: clumsy, cumbersome, ill-chosen, inapt, inept |
| (adjective) socially uncomfortable; unsure and constrained in manner | Synonyms: ill at ease, uneasy |
| (adjective) difficult to handle or manage especially because of shape | Synonyms: bunglesome, clumsy, ungainly |
| awned | (adjective) having awns i.e. bristlelike or hairlike appendages on the flowering parts of some cereals and grasses | Synonyms: awny |
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| awninged | (adjective) covered with an awning | - |
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| axseed | (noun) European herb resembling vetch; naturalized in the eastern United States; having umbels of pink-and-white flowers and sharp-angled pods | Synonyms: Coronilla varia, crown vetch |
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| babyhood | (noun) the earliest state of immaturity | Synonyms: infancy |
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| (noun) the early stage of growth or development | Synonyms: early childhood, infancy |
| bachelorhood | (noun) the state of being an unmarried man | - |
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| (noun) the time of a man's life prior to marriage | - |
| backband | (noun) a broad band that passes over the back of a horse and supports the shafts of a vehicle | - |
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| backbend | (noun) an acrobatic feat in which the trunk is bent backward from a standing position until the hands touch the floor | - |
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| backboard | (noun) a board used to support the back of someone or something | - |
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| (noun) a raised vertical board with basket attached; used to play basketball | Synonyms: basketball backboard |
| backed | (adjective) having a back or backing, usually of a specified type | - |
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| (adjective) used of film that is coated on the side opposite the emulsion with a substance to absorb light | - |
| backfield | (noun) the offensive football players who line up behind the linemen | - |
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| background | (noun) scenery hung at back of stage | Synonyms: backcloth, backdrop |
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| (noun) (computer science) the area of the screen in graphical user interfaces against which icons and windows appear | Synonyms: desktop, screen background |
| (noun) a person's social heritage: previous experience or training | - |
| (noun) the part of a scene (or picture) that lies behind objects in the foreground | Synonyms: ground |
| (noun) information that is essential to understanding a situation or problem | Synonyms: background knowledge |
| (noun) extraneous signals that can be confused with the phenomenon to be observed or measured | Synonyms: background signal |
| (noun) relatively unimportant or inconspicuous accompanying situation | - |
| (noun) the state of the environment in which a situation exists | Synonyms: scope, setting |
| (verb) understate the importance or quality of | Synonyms: downplay, play down |
| backhand | (adjective) (of racket strokes) made across the body with back of hand facing direction of stroke | Synonyms: backhanded |
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| (adjective) (of handwriting) having the letters slanting backward | Synonyms: left-slanting |
| (noun) a return made with the back of the hand facing the direction of the stroke | Synonyms: backhand shot, backhand stroke |
| (verb) hit a tennis ball backhand | - |
| backhanded | (adjective) (of racket strokes) made across the body with back of hand facing direction of stroke | Synonyms: backhand |
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| (adjective) roundabout or ambiguous | - |
| backsword | (noun) a sword with only one cutting edge | - |
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| (noun) a stick used instead of a sword for fencing | Synonyms: fencing stick, singlestick |
| backward | (adjective) directed or facing toward the back or rear | - |
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| (adjective) (used of temperament or behavior) marked by a retiring nature | - |
| (adjective) retarded in intellectual development | Synonyms: feebleminded, half-witted, slow-witted |
| (adjective) having made less than normal progress | - |
| (adverb) in a manner or order or direction the reverse of normal | Synonyms: backwards |
| (adverb) in or to or toward a past time | Synonyms: back |
| (adverb) at or to or toward the back or rear | Synonyms: back, backwards, rearward, rearwards |
| backyard | (noun) the grounds in back of a house | - |
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| bacterioid | (adjective) resembling bacteria | Synonyms: bacterioidal, bacteroid, bacteroidal |
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| bacteroid | (adjective) resembling bacteria | Synonyms: bacterioid, bacterioidal, bacteroidal |
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| (noun) a rodlike bacterium (especially any of the rod-shaped or branched bacteria in the root nodules of nitrogen-fixing plants) | - |
| bad | (adjective) having undesirable or negative qualities | - |
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| (adjective) feeling or expressing regret or sorrow or a sense of loss over something done or undone | Synonyms: regretful, sorry |
| (adjective) reproduced fraudulently | Synonyms: forged |
| (adjective) characterized by wickedness or immorality | - |
| (adjective) capable of harming | - |
| (adjective) below average in quality or performance | - |
| (adjective) serious or severe | Synonyms: big |
| (adjective) not capable of being collected | Synonyms: uncollectible |
| (adjective) not working properly | Synonyms: defective |
| (adjective) nonstandard | - |
| (adjective) (of foodstuffs) not in an edible or usable condition | Synonyms: spoiled, spoilt |
| (adjective) feeling physical discomfort or pain (`tough' is occasionally used colloquially for `bad') | Synonyms: tough |
| (adjective) physically unsound or diseased | Synonyms: unfit, unsound |
| (adjective) not financially safe or secure | Synonyms: high-risk, risky, speculative |
| (noun) that which is below standard or expectations as of ethics or decency | Synonyms: badness |
| (adverb) very much; strongly | Synonyms: badly |
| (adverb) with great intensity (`bad' is a nonstandard variant for `badly') | Synonyms: badly |
| baffled | (adjective) perplexed by many conflicting situations or statements; filled with bewilderment | Synonyms: at sea, befuddled, bemused, bewildered, confounded, confused, lost, mazed, mixed-up |
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| (noun) people who are frustrated and perplexed | - |
| baked | (adjective) (bread and pastries) cooked by dry heat (as in an oven) | - |
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| (adjective) dried out by heat or excessive exposure to sunlight | Synonyms: adust, parched, scorched, sunbaked |
| balanced | (adjective) being in a state of proper equilibrium | - |
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| balconied | (adjective) having balconies or a balcony | - |
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