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• unbecoming
• urban
• unit
• unpromising
• unisex
• unrefined
• underworld
• unjust
• unsafe
• unwise
• undo
• useless
• understate
• unexpected
• uninvited
• uneven
• undertake
• universe
• unkindly
• undressed
• utensil
• untruth
• unreadable
• unpremeditated
• unmanly
• unforgivable
• U-boat
• unjustifiable
• unpardonable
• unhappiness
• unfurl
• unfold
• understandable
• unsupported
• unveil
• unmask
• unintelligible
• untouchable
• used
• unassailable
• unfathomable
• unimaginative
• undisturbed
• unconquerable
• unbeatable
• unemployed
• unusable
• unlatch
• unbar
• unmanageable
• unpack
• unlock
• unwieldy
• usher
• user
• unkindness
• unification
• unemployment
• uppermost
• upkeep
• urbanity
• uniformity
• union
• unnecessary
• underlying
• uncontrollable
• underhanded
• uphold
• unfailing
• unsanitary
• unsatisfied
• undergo
• unchanging
• unobservant
• unconscious
• unwavering
• unmoved
• unfaithful
• unhappy
• under
• unquestionable
• unsteady
• unchangeable
• unlucky
• unfortunate
• unfruitful
• unsuccessful
• untrue
• unchaste
• uncontrolled
• unconstrained
• unrepentant
• upgrade
• unproductive
• unmindful
• unprofitable
• unreal
• ungraceful
• unsuitable
• usable
• untimely
• unseasonable
• unscrupulous
• ungracious
• uncivil
• unacquainted
• uncomfortable
• unrealistic
• useful
• unsavory
• ungainly
• unpolished
• unclean
• unseemly
• unsatisfactory
• untouched
• unproved
• unlearned
• unworthy
• unethical

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因篇幅关系，字母U开头的单词只列出前 120 个；字母U开头的英语单词由君君词典提供查询