| la | (noun) the syllable naming the sixth (submediant) note of a major or minor scale in solmization | Synonyms: lah |
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| laager | (noun) a camp defended by a circular formation of wagons | Synonyms: lager |
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| lab | (noun) a workplace for the conduct of scientific research | Synonyms: laboratory, research lab, research laboratory, science lab, science laboratory |
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| labdanum | (noun) a soft blackish-brown resinous exudate from various rockroses used in perfumes especially as a fixative | Synonyms: ladanum |
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| (noun) a dark brown to greenish oleoresin that has a fragrant odor and is used as a fixative in perfumes; obtained as a juice from certain rockroses | Synonyms: gum labdanum |
| label | (noun) an identifying or descriptive marker that is attached to an object | - |
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| (noun) a brief description given for purposes of identification | - |
| (noun) trade name of a company that produces musical recordings | Synonyms: recording label |
| (noun) a radioactive isotope that is used in a compound in order to trace the mechanism of a chemical reaction | - |
| (verb) distinguish (an element or atom) by using a radioactive isotope or an isotope of unusual mass for tracing through chemical reactions | - |
| (verb) distinguish (as a compound or molecule) by introducing a labeled atom | - |
| (verb) assign a label to; designate with a label | - |
| (verb) pronounce judgment on | Synonyms: judge, pronounce |
| (verb) attach a tag or label to | Synonyms: mark, tag |
| labeled | (adjective) bearing or marked with a label or tag | Synonyms: labelled, tagged |
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| labelled | (adjective) bearing or marked with a label or tag | Synonyms: labeled, tagged |
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| labetalol | (noun) antihypertensive drug (trade names Trandate and Normodyne) that blocks alpha and beta-adrenergic receptors of the sympathetic nervous system (leading to a decrease in blood pressure) | Synonyms: labetalol hydrochloride, Normodyne, Trandate |
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| labial | (adjective) relating to or near the female labium | - |
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| (adjective) of or relating to the lips of the mouth | - |
| (noun) a consonant whose articulation involves movement of the lips | Synonyms: labial consonant |
| labialise | (verb) pronounce with rounded lips | Synonyms: labialize, round |
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| labialize | (verb) pronounce with rounded lips | Synonyms: labialise, round |
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| labiate | (adjective) having lips or parts that resemble lips | Synonyms: liplike |
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| labile | (adjective) (chemistry, physics, biology) readily undergoing change or breakdown | - |
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| (adjective) liable to change | - |
| labiodental | (noun) a consonant whose articulation involves the lips and teeth | Synonyms: labiodental consonant |
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| labium | (noun) a liplike structure that bounds a bodily orifice (especially any of the four labiate folds of a woman's vulva) | - |
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| labor | (noun) productive work (especially physical work done for wages) | Synonyms: labour, toil |
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| (noun) any piece of work that is undertaken or attempted | Synonyms: labour, project, task, undertaking |
| (noun) a social class comprising those who do manual labor or work for wages | Synonyms: labour, proletariat, working class |
| (noun) an organized attempt by workers to improve their status by united action (particularly via labor unions) or the leaders of this movement | Synonyms: labor movement, labour, trade union movement |
| (noun) concluding state of pregnancy; from the onset of contractions to the birth of a child | Synonyms: childbed, confinement, labour, lying-in, parturiency, travail |
| (verb) undergo the efforts of childbirth | Synonyms: labour |
| (verb) work hard | Synonyms: dig, drudge, fag, grind, labour, moil, toil, travail |
| (verb) strive and make an effort to reach a goal | Synonyms: drive, labour, push, tug |
| laboratory | (noun) a workplace for the conduct of scientific research | Synonyms: lab, research lab, research laboratory, science lab, science laboratory |
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| (noun) a region resembling a laboratory inasmuch as it offers opportunities for observation and practice and experimentation | Synonyms: testing ground |
| labored | (adjective) lacking natural ease | Synonyms: laboured, strained |
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| (adjective) requiring or showing effort | Synonyms: heavy, laboured |
| laborer | (noun) someone who works with their hands; someone engaged in manual labor | Synonyms: jack, labourer, manual laborer |
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| laboring | (adjective) doing arduous or unpleasant work | Synonyms: drudging, labouring, toiling |
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| laborious | (adjective) characterized by effort to the point of exhaustion; especially physical effort | Synonyms: arduous, backbreaking, grueling, gruelling, hard, heavy, operose, punishing, toilsome |
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| laboriously | (adverb) in a laborious manner | - |
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| laboriousness | (noun) the quality of requiring extended effort | Synonyms: operoseness, toilsomeness |
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| laborsaving | (adjective) designed to replace or conserve human and especially manual labor | Synonyms: laboursaving |
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| labour | (noun) productive work (especially physical work done for wages) | Synonyms: labor, toil |
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| (noun) any piece of work that is undertaken or attempted | Synonyms: labor, project, task, undertaking |
| (noun) a social class comprising those who do manual labor or work for wages | Synonyms: labor, proletariat, working class |
| (noun) an organized attempt by workers to improve their status by united action (particularly via labor unions) or the leaders of this movement | Synonyms: labor, labor movement, trade union movement |
| (noun) concluding state of pregnancy; from the onset of contractions to the birth of a child | Synonyms: childbed, confinement, labor, lying-in, parturiency, travail |
| (verb) undergo the efforts of childbirth | Synonyms: labor |
| (verb) work hard | Synonyms: dig, drudge, fag, grind, labor, moil, toil, travail |
| (verb) strive and make an effort to reach a goal | Synonyms: drive, labor, push, tug |
| laboured | (adjective) lacking natural ease | Synonyms: labored, strained |
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| (adjective) requiring or showing effort | Synonyms: heavy, labored |
| labourer | (noun) someone who works with their hands; someone engaged in manual labor | Synonyms: jack, laborer, manual laborer |
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| labouring | (adjective) doing arduous or unpleasant work | Synonyms: drudging, laboring, toiling |
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| laboursaving | (adjective) designed to replace or conserve human and especially manual labor | Synonyms: laborsaving |
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| labrocyte | (noun) a large connective tissue cell that contains histamine and heparin and serotonin which are released in allergic reactions or in response to injury or inflammation | Synonyms: mast cell, mastocyte |
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| labyrinth | (noun) complex system of paths or tunnels in which it is easy to get lost | Synonyms: maze |
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| (noun) a complex system of interconnecting cavities; concerned with hearing and equilibrium | Synonyms: inner ear, internal ear |
| labyrinthian | (adjective) resembling a labyrinth in form or complexity | Synonyms: labyrinthine, mazy |
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| labyrinthine | (adjective) relating to or affecting or originating in the inner ear | - |
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| (adjective) resembling a labyrinth in form or complexity | Synonyms: labyrinthian, mazy |
| (adjective) highly complex or intricate and occasionally devious | Synonyms: Byzantine, convoluted, involved, knotty, tangled, tortuous |
| labyrinthitis | (noun) inflammation of the inner ear; can cause vertigo and vomiting | Synonyms: otitis interna |
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| labyrinthodont | (noun) an amphibian of the superorder Labyrinthodontia | - |
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| lac | (noun) resinlike substance secreted by certain lac insects; used in e.g. varnishes and sealing wax | - |
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| lace | (noun) a delicate decorative fabric woven in an open web of symmetrical patterns | - |
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| (noun) a cord that is drawn through eyelets or around hooks in order to draw together two edges (as of a shoe or garment) | Synonyms: lacing |
| (verb) add alcohol to (beverages) | Synonyms: fortify, spike |
| (verb) draw through eyes or holes | Synonyms: lace up |
| (verb) spin, wind, or twist together | Synonyms: enlace, entwine, interlace, intertwine, twine |
| (verb) do lacework | - |
| (verb) make by braiding or interlacing | Synonyms: braid, plait |
| lacebark | (noun) small tree or shrub of New Zealand having a profusion of axillary clusters of honey-scented paper-white flowers and whose bark is used for cordage | Synonyms: Hoheria populnea, houhere, ribbonwood |
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| laced | (adjective) closed with a lace | Synonyms: tied |
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| (adjective) edged or streaked with color | - |
| lacelike | (adjective) made of or resembling lace | Synonyms: lacy |
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| lacepod | (noun) annual herb having pinnatifid basal leaves and slender racemes of small white flowers followed by one-seeded winged silicles | Synonyms: fringepod |
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| lacer | (noun) a workman who laces shoes or footballs or books (during binding) | - |
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| lacerate | (adjective) having edges that are jagged from injury | Synonyms: lacerated, mangled, torn |
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| (adjective) irregularly slashed and jagged as if torn | Synonyms: lacerated |
| (verb) cut or tear irregularly | - |
| (verb) deeply hurt the feelings of; distress | - |
| lacerated | (adjective) having edges that are jagged from injury | Synonyms: lacerate, mangled, torn |
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| (adjective) irregularly slashed and jagged as if torn | Synonyms: lacerate |
| laceration | (noun) the act of lacerating | - |
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| (noun) a torn ragged wound | - |
| lacertid | (noun) Old World terrestrial lizard | Synonyms: lacertid lizard |
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| lacertilian | (adjective) of or relating to lizards | Synonyms: saurian |
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| lacewing | (noun) any of two families of insects with gauzy wings (Chrysopidae and Hemerobiidae); larvae feed on insect pests such as aphids | Synonyms: lacewing fly |
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| lacewood | (noun) variably colored and sometimes variegated hard tough elastic wood of a sycamore tree | Synonyms: sycamore |
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| lacework | (noun) work consisting of (or resembling) lace fabric | - |
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| lachrymal | (adjective) of or relating to tears | Synonyms: lacrimal |
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| (adjective) relating to or located near the organ that produces tears | Synonyms: lacrimal |
| lachrymation | (noun) shedding tears | Synonyms: lacrimation, tearing, watering |
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| lachrymator | (noun) a gas that makes the eyes fill with tears but does not damage them; used in dispersing crowds | Synonyms: lacrimator, tear gas, teargas |
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| lachrymatory | (adjective) relating to or prompting tears | Synonyms: lacrimatory |
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| lachrymose | (adjective) showing sorrow | Synonyms: dolorous, dolourous, tearful, weeping |
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| lacing | (noun) the act of inflicting corporal punishment with repeated blows | Synonyms: beating, drubbing, licking, thrashing, trouncing, whacking |
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| (noun) a cord that is drawn through eyelets or around hooks in order to draw together two edges (as of a shoe or garment) | Synonyms: lace |
| (noun) a small amount of liquor added to a food or beverage | - |
| laciniate | (adjective) having edges irregularly and finely slashed | Synonyms: fringed |
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| lack | (noun) the state of needing something that is absent or unavailable | Synonyms: deficiency, want |
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| (verb) be without | Synonyms: miss |
| (verb) To be insufficiently prepared | - |
| lackadaisical | (adjective) idle or indolent especially in a dreamy way | - |
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| (adjective) lacking spirit or liveliness | Synonyms: dreamy, languid, languorous |
| lackadaisically | (adverb) in an idle and lackadaisical manner | - |
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| lackey | (noun) a male servant (especially a footman) | Synonyms: flunkey, flunky |
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| (noun) a person who tries to please someone in order to gain a personal advantage | Synonyms: ass-kisser, crawler, sycophant, toady |
| lacking | (adjective) inadequate in amount or degree | Synonyms: deficient, wanting |
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| (adjective) nonexistent | Synonyms: absent, missing, wanting |
| lackluster | (adjective) lacking luster or shine | Synonyms: lacklustre, lusterless, lustreless |
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| (adjective) lacking brilliance or vitality | Synonyms: lacklustre, lusterless, lustreless |
| lacklustre | (adjective) lacking luster or shine | Synonyms: lackluster, lusterless, lustreless |
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| (adjective) lacking brilliance or vitality | Synonyms: lackluster, lusterless, lustreless |
| laconic | (adjective) brief and to the point; effectively cut short | Synonyms: crisp, curt, terse |
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| laconically | (adverb) in a dry laconic manner | Synonyms: drily, dryly |
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| laconicism | (noun) terseness of expression | Synonyms: laconism |
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| laconism | (noun) terseness of expression | Synonyms: laconicism |
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| lacquer | (noun) a hard glossy coating | - |
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| (noun) a black resinous substance obtained from certain trees and used as a natural varnish | - |
| (verb) coat with lacquer | - |
| lacquerware | (noun) a decorative work made of wood and covered with lacquer and often inlaid with ivory or precious metals | - |
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| lacrimal | (adjective) of or relating to tears | Synonyms: lachrymal |
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| (adjective) relating to or located near the organ that produces tears | Synonyms: lachrymal |
| lacrimation | (noun) shedding tears | Synonyms: lachrymation, tearing, watering |
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| lacrimator | (noun) a gas that makes the eyes fill with tears but does not damage them; used in dispersing crowds | Synonyms: lachrymator, tear gas, teargas |
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| lacrimatory | (adjective) relating to or prompting tears | Synonyms: lachrymatory |
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| lacrosse | (noun) a game invented by American Indians; now played by two teams who use long-handled rackets to catch and carry and throw the ball toward the opponents' goal | - |
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| lactalbumin | (noun) albumin occurring in milk | - |
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| lactase | (noun) any of a group of enzymes (trade name Lactaid) that hydrolyze lactose to glucose and galactose | Synonyms: Lactaid |
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| lactate | (noun) a salt or ester of lactic acid | - |
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| (verb) give suck to | Synonyms: breastfeed, give suck, nurse, suck, suckle, wet-nurse |
| lactating | (adjective) producing or secreting milk | Synonyms: wet |
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| lactation | (noun) feeding an infant by giving suck at the breast | Synonyms: suckling |
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| (noun) the production and secretion of milk by the mammary glands | - |
| (noun) the period following birth during which milk is secreted | - |
| lacteal | (adjective) relating to or consisting of or producing or resembling milk | - |
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| (noun) any of the lymphatic vessels that convey chyle from the small intestine to the thoracic duct | - |
| lactic | (adjective) of or relating to or obtained from milk (especially sour milk or whey) | - |
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| lactide | (noun) any of a class of heterocyclic compounds, formally acid anhydrides, formed by heating α-lactones. | - |
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| lactifuge | (noun) any agent that reduces milk secretion (as given to a woman who is not breast feeding) | - |
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| lactobacillus | (noun) a Gram-positive rod-shaped bacterium that produces lactic acid (especially in milk) | - |
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| lactoflavin | (noun) a B vitamin that prevents skin lesions and weight loss | Synonyms: hepatoflavin, ovoflavin, riboflavin, vitamin B2, vitamin G |
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| lactogen | (noun) any agent that enhances milk production | - |
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| lactogenic | (adjective) inducing lactation | - |
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| lactoglobulin | (noun) a globular protein found in milk. | - |
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| lactone | (noun) a cyclic intramolecular ester derived from a hydroxy acid. | - |
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| lactose | (noun) a sugar comprising one glucose molecule linked to a galactose molecule; occurs only in milk | Synonyms: milk sugar |
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| lactosuria | (noun) presence of lactose in the urine; can occur during pregnancy or lactation | - |
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| lacuna | (noun) a blank gap or missing part | Synonyms: blank |
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| lacunar | (noun) an ornamental sunken panel in a ceiling or dome | Synonyms: caisson, coffer |
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| lacustrine | (adjective) of or relating to or living near lakes | - |
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| lacy | (adjective) made of or resembling lace | Synonyms: lacelike |
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| (adjective) having open interstices or resembling a web | Synonyms: netlike, netted, webbed, webby, weblike |
| lad | (noun) a male child (a familiar term of address to a boy) | Synonyms: cub, laddie, sonny, sonny boy |
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| (noun) a boy or man | Synonyms: blighter, bloke, chap, cuss, fella, feller, fellow, gent |
| ladanum | (noun) a soft blackish-brown resinous exudate from various rockroses used in perfumes especially as a fixative | Synonyms: labdanum |
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| ladder | (noun) steps consisting of two parallel members connected by rungs; for climbing up or down | - |
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| (noun) a row of unravelled stitches | Synonyms: ravel, run |
| (noun) ascending stages by which somebody or something can progress | - |
| (verb) come unraveled or undone as if by snagging | Synonyms: run |
| laddie | (noun) a male child (a familiar term of address to a boy) | Synonyms: cub, lad, sonny, sonny boy |
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