| unbeknown | (adjective) (usually used with `to') occurring or existing without the knowledge of | Synonyms: unbeknownst |
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| unborn | (adjective) not yet brought into existence | - |
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| unbroken | (adjective) not broken; whole and intact; in one piece | - |
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| (adjective) marked by continuous or uninterrupted extension in space or time or sequence | - |
| (adjective) (especially of promises or contracts) not violated or disregarded | Synonyms: kept |
| (adjective) (of farmland) not plowed | Synonyms: unploughed, unplowed |
| (adjective) not subdued or trained for service or use | - |
| uncertain | (adjective) not established beyond doubt; still undecided or unknown | - |
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| (adjective) lacking or indicating lack of confidence or assurance | Synonyms: incertain, unsure |
| (adjective) not certain to occur; not inevitable | - |
| (adjective) not established or confirmed | Synonyms: unsealed |
| (adjective) ambiguous (especially in the negative) | - |
| (adjective) not consistent or dependable | - |
| (adjective) subject to change | Synonyms: changeable, unsettled |
| unchristian | (adjective) not of a Christian faith | - |
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| unclean | (adjective) having a physical or moral blemish so as to make impure according to dietary or ceremonial laws | Synonyms: impure |
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| (adjective) soiled or likely to soil with dirt or grime | Synonyms: dirty, soiled |
| uncommon | (adjective) not common or ordinarily encountered; unusually great in amount or remarkable in character or kind | - |
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| (adjective) marked by an uncommon quality; especially superlative or extreme of its kind | Synonyms: rare |
| undrawn | (adjective) not represented in a drawing | - |
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| uneven | (adjective) not even or uniform as e.g. in shape or texture | - |
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| (adjective) not divisible by two | Synonyms: odd |
| (adjective) lacking consistency | Synonyms: scratchy, spotty |
| (adjective) (of a contest or contestants) not fairly matched as opponents | Synonyms: mismatched |
| (adjective) variable and recurring at irregular intervals | - |
| unforeseen | (adjective) not anticipated | Synonyms: out of the blue, unanticipated, unlooked-for, unseen |
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| unfrozen | (adjective) not frozen | - |
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| unhewn | (adjective) (of stone especially) not given a finished form by or as if by hewing | - |
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| unhuman | (adjective) divested of human qualities or attributes | Synonyms: dehumanised, dehumanized |
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| union | (adjective) of trade unions | - |
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| unknown | (adjective) not known | - |
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| (adjective) being or having an unknown or unnamed source | Synonyms: nameless, unidentified, unnamed |
| (adjective) not famous or acclaimed | Synonyms: obscure, unsung |
| (adjective) not known before | Synonyms: strange |
| (adjective) not known to exist | - |
| unmown | (adjective) (used of grass or vegetation) not cut down with a hand implement or machine | Synonyms: uncut |
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| unopen | (adjective) not open | Synonyms: closed, shut |
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| unproven | (adjective) not proved | Synonyms: unproved |
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| unsectarian | (adjective) not restricted to one sect or school or party | Synonyms: nonsectarian |
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| unseen | (adjective) not seen or perceived | - |
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| (adjective) not anticipated | Synonyms: out of the blue, unanticipated, unforeseen, unlooked-for |
| (adjective) unnoticed | Synonyms: unobserved |
| unshaken | (adjective) unshaken in purpose | Synonyms: undaunted, undismayed |
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| unshapen | (adjective) incompletely or imperfectly shaped | Synonyms: unshaped |
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| unshaven | (adjective) not shaved | Synonyms: unshaved |
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| unshorn | (adjective) not sheared | Synonyms: unsheared |
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| unsown | (adjective) (of a piece of ground) not have a crop sown on it | Synonyms: unseeded |
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| unspoken | (adjective) not made explicit | Synonyms: unexpressed, unsaid, unstated, unuttered, unverbalised, unverbalized, unvoiced |
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| (adjective) expressed without speech | Synonyms: mute, silent, tongueless, wordless |
| unsworn | (adjective) not bound by or stated on oath | - |
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| untrodden | (adjective) lacking pathways | Synonyms: pathless, roadless, trackless, untracked, untrod |
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| unwoven | (adjective) not woven | - |
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| unwritten | (adjective) based on custom rather than documentation | - |
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| (adjective) using speech rather than writing | Synonyms: oral |
| (adjective) said or done without having been planned or written in advance | Synonyms: ad-lib, spontaneous |
| uptown | (adjective) of or located in the upper part of a town | - |
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| urban | (adjective) located in or characteristic of a city or city life | - |
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| (adjective) relating to or concerned with a city or densely populated area | - |
| utilitarian | (adjective) having a useful function | Synonyms: useful |
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| (adjective) having utility often to the exclusion of values | - |
| utopian | (adjective) characterized by or aspiring to impracticable perfection | - |
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| (adjective) of or pertaining to or resembling a utopia | Synonyms: Utopian |
| vain | (adjective) characteristic of false pride; having an exaggerated sense of self-importance | Synonyms: conceited, egotistic, egotistical, self-conceited, swollen-headed, swollen |
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| (adjective) unproductive of success | Synonyms: bootless, fruitless, futile, sleeveless |
| valetudinarian | (adjective) of or relating to or characteristic of a person who is a valetudinarian | Synonyms: valetudinary |
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| verboten | (adjective) excluded from use or mention | Synonyms: forbidden, out, prohibited, proscribed, taboo, tabu |
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| vermilion | (adjective) of a vivid red to reddish-orange color | Synonyms: Chinese-red, cinnabar, vermillion |
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| vermillion | (adjective) of a vivid red to reddish-orange color | Synonyms: Chinese-red, cinnabar, vermilion |
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| veteran | (adjective) rendered competent through trial and experience | Synonyms: seasoned |
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| victorian | (adjective) exaggeratedly proper | Synonyms: priggish, prim, prissy, prudish, puritanical, square-toed, straight-laced, straightlaced, strait-laced, straitlaced, tight-laced |
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| virgin | (adjective) in a state of sexual virginity | Synonyms: pure, vestal, virginal, virtuous |
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| (adjective) being used or worked for the first time | - |
| wan | (adjective) abnormally deficient in color as suggesting physical or emotional distress | Synonyms: pale, pallid |
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| (adjective) (of light) lacking in intensity or brightness; dim or feeble | Synonyms: pale, pallid, sick |
| (adjective) lacking vitality as from weariness or illness or unhappiness | - |
| wanton | (adjective) casual and unrestrained in sexual behavior | Synonyms: easy, light, loose, promiscuous, sluttish |
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| (adjective) occurring without motivation or provocation | Synonyms: motiveless, unprovoked |
| waterworn | (adjective) (of rocks especially) worn smooth by the action of water | - |
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| waxen | (adjective) made of or covered with wax | Synonyms: waxy |
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| (adjective) having the paleness of wax | Synonyms: waxlike, waxy |
| weatherworn | (adjective) worn by exposure to the weather | Synonyms: weather-beaten, weathered |
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| wellborn | (adjective) of good or upper-class lineage | - |
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| western | (adjective) relating to or characteristic of the western parts of the world or the West as opposed to the eastern or oriental parts | - |
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| (adjective) of or characteristic of regions of the United States west of the Mississippi River | - |
| (adjective) lying toward or situated in the west | - |
| (adjective) of wind; from the west | Synonyms: westerly |
| wheaten | (adjective) of or relating to or derived from wheat | Synonyms: whole-wheat, wholemeal |
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| windblown | (adjective) used especially of trees; growing in a shape determined by the prevailing winds | - |
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| withdrawn | (adjective) tending to reserve or introspection | Synonyms: indrawn |
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| (adjective) withdrawn from society; seeking solitude | Synonyms: recluse, reclusive |
| wizen | (adjective) lean and wrinkled by shrinkage as from age or illness | Synonyms: shriveled, shrivelled, shrunken, withered, wizened |
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| won | (adjective) not subject to defeat | - |
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| wooden | (adjective) lacking ease or grace | - |
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| (adjective) made or consisting of (entirely or in part) or employing wood | - |
| woolen | (adjective) of or related to or made of wool | Synonyms: woollen |
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| woollen | (adjective) of or related to or made of wool | Synonyms: woolen |
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| worn | (adjective) affected by wear; damaged by long use | - |
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| (adjective) showing the wearing effects of overwork or care or suffering | Synonyms: careworn, drawn, haggard, raddled |
| woven | (adjective) made or constructed by interlacing threads or strips of material or other elements into a whole | - |
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| writhen | (adjective) twisted (especially as in pain or struggle) | Synonyms: contorted, writhed |
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| written | (adjective) set down in writing in any of various ways | - |
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| (adjective) systematically collected and written down | - |
| (adjective) written as for a film or play or broadcast | Synonyms: scripted |
| yon | (adjective) distant but within sight (`yon' is dialectal) | Synonyms: yonder |
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| zillion | (adjective) very large indeterminate number | - |
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