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• uncle
• uniformity
• unbelievable
• unfashionable
• unobserved
• unaffected
• uncritical
• universe
• uterine
• unbeliever
• unfailing
• upbraid
• unbiased
• undergo
• unlawful
• untidy
• unification
• ugly
• unlucky
• unconscious
• unhealthy
• unassuming
• unbounded
• unskilled
• upland
• undo
• unseemly
• uncommitted
• unfair
• utmost
• ungainly
• utopian
• unaware
• umbrella
• upstairs
• universal
• uptown
• unjustified
• utter
• ulcer
• Urdu
• unite
• unconformity
• unrestricted
• uninhabited
• unravel
• unit
• urban
• usage
• urgency
• unflagging
• undistinguished
• unspoiled
• unjust
• undertaking
• unfinished
• ultraviolet
• unpopular
• umpire
• unrefined
• unnatural
• upward
• undress
• umbra
• ulna
• urethra
• ultimatum
• uncivil
• unresponsive
• unemployed
• unattached
• until
• unwind
• underworld
• uphold
• utensil
• unscramble
• unconditional
• unison
• utopia
• use
• upstage
• usual
• unfit
• unmeasurable
• university
• unlikely
• uneven
• ultimate
• up-to-date
• unicorn
• unilateral
• unwavering
• underlie
• used
• usable
• uproar
• unload
• unsightly
• unknowing
• unaccountable
• unfriendly
• unbroken
• uniform
• uncomfortable
• uterus
• unbearable
• unsound
• unflappable
• unready
• uranium
• unsuccessful
• untouched
• united
• utopianism
• uncouth
• upper
• union
• unpredictable
• uncertain

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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开头的英语单词由翁笔典籍网提供查询