| unforesightful | (adjective) lacking foresight or scope | Synonyms: myopic, short, shortsighted |
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| unforethoughtful | (adjective) lacking forethought | - |
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| unfruitful | (adjective) not fruitful; not conducive to abundant production | - |
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| ungraceful | (adjective) lacking grace; clumsy | Synonyms: graceless |
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| ungrateful | (adjective) not feeling or showing gratitude | Synonyms: thankless, unthankful |
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| (adjective) disagreeable | - |
| unhealthful | (adjective) detrimental to good health | - |
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| (adjective) not sanitary or healthful | Synonyms: insanitary, unsanitary |
| (adjective) detrimental to health | Synonyms: insalubrious, unhealthy |
| unhelpful | (adjective) providing no assistance | - |
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| unhopeful | (adjective) showing utter resignation or hopelessness | Synonyms: abject |
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| unlawful | (adjective) contrary to or prohibited by or defiant of law | - |
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| (adjective) contrary to or forbidden by law | Synonyms: illegitimate, illicit, outlaw, outlawed |
| (adjective) having no legally established claim | Synonyms: wrongful |
| (adjective) not morally right or permissible | - |
| (adjective) not conforming to legality, moral law, or social convention | Synonyms: improper, unconventional |
| unmanful | (adjective) not possessing qualities befitting a man | Synonyms: unmanlike, unmanly |
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| unmerciful | (adjective) having or showing no mercy | Synonyms: merciless |
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| unmindful | (adjective) not mindful or attentive | Synonyms: forgetful, mindless |
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| (adjective) (followed by `to' or `of') lacking conscious awareness of | Synonyms: oblivious |
| unpainful | (adjective) not accompanied by pain sensations | Synonyms: pain-free |
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| unpeaceful | (adjective) not peaceful | - |
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| unplayful | (adjective) completely lacking in playfulness | Synonyms: serious, sober |
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| unregretful | (adjective) feeling no regret | Synonyms: unregretting |
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| unremorseful | (adjective) not penitent or remorseful | Synonyms: impenitent, unrepentant |
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| unresentful | (adjective) not resentful | - |
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| unskillful | (adjective) poorly done | Synonyms: botchy, butcherly |
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| unsuccessful | (adjective) not successful; having failed or having an unfavorable outcome | - |
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| (adjective) failing to accomplish an intended result | Synonyms: abortive, stillborn |
| untactful | (adjective) lacking or showing a lack of what is fitting and considerate in dealing with others | Synonyms: tactless |
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| unthankful | (adjective) not feeling or showing gratitude | Synonyms: thankless, ungrateful |
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| unthoughtful | (adjective) not exhibiting or characterized by careful thought | Synonyms: unreflective, unthinking |
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| untruthful | (adjective) not expressing or given to expressing the truth | - |
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| untuneful | (adjective) not having a musical sound or pleasing tune | Synonyms: tuneless, unmelodious |
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| unwatchful | (adjective) not alert to what is potentially dangerous | Synonyms: unalert, unvigilant |
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| useful | (adjective) being of use or service | Synonyms: utile |
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| (adjective) having a useful function | Synonyms: utilitarian |
| vengeful | (adjective) disposed to seek revenge or intended for revenge | Synonyms: revengeful, vindictive |
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| wailful | (adjective) vocally expressing grief or sorrow or resembling such expression | Synonyms: lamenting, wailing |
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| wakeful | (adjective) carefully observant or attentive; on the lookout for possible danger | Synonyms: argus-eyed, open-eyed, vigilant, watchful |
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| (adjective) marked by full consciousness or alertness | Synonyms: waking |
| (adjective) (of sleep) easily disturbed | Synonyms: light |
| wasteful | (adjective) tending to squander and waste | - |
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| (adjective) laying waste | - |
| (adjective) inefficient in use of time and effort and materials | Synonyms: uneconomical |
| watchful | (adjective) engaged in or accustomed to close observation | Synonyms: alert |
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| (adjective) experiencing or accompanied by sleeplessness | Synonyms: insomniac, sleepless |
| (adjective) carefully observant or attentive; on the lookout for possible danger | Synonyms: argus-eyed, open-eyed, vigilant, wakeful |
| wilful | (adjective) habitually disposed to disobedience and opposition | Synonyms: froward, headstrong, self-willed, willful |
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| (adjective) done by design | Synonyms: willful |
| willful | (adjective) habitually disposed to disobedience and opposition | Synonyms: froward, headstrong, self-willed, wilful |
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| (adjective) done by design | Synonyms: wilful |
| wishful | (adjective) having or expressing desire for something | Synonyms: desirous |
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| (adjective) desiring or striving for recognition or advancement | Synonyms: aspirant, aspiring |
| wistful | (adjective) showing pensive sadness | Synonyms: pensive |
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| woeful | (adjective) of very poor quality or condition | Synonyms: deplorable, execrable, miserable, wretched |
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| (adjective) affected by or full of grief or woe | Synonyms: woebegone |
| wonderful | (adjective) extraordinarily good or great; used especially as intensifiers | Synonyms: fantastic, grand, howling, marvellous, marvelous, phenomenal, rattling, terrific, tremendous, wondrous |
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| worshipful | (adjective) showing great reverence for god | Synonyms: godly, reverent |
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| (adjective) showing adoration | Synonyms: adoring |
| worthful | (adjective) having worth or merit or value | Synonyms: valuable |
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| wrathful | (adjective) vehemently incensed and condemnatory | Synonyms: wroth, wrothful |
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| wrongful | (adjective) having no legally established claim | Synonyms: unlawful |
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| (adjective) not just or fair | - |
| (adjective) unlawfully violating the rights of others | - |
| wrothful | (adjective) vehemently incensed and condemnatory | Synonyms: wrathful, wroth |
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| youthful | (adjective) suggestive of youth; vigorous and fresh | Synonyms: vernal, young |
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| zestful | (adjective) marked by spirited enjoyment | Synonyms: barmy, yeasty, zesty |
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