首字母 a b c d e f g h i j k l m n o p q r s t u v w x y z

u开头的英语单词、第一个字母是u的英语词组有哪些（第2页）

unfortunately unspoken unexpected unpaid unbelievable university student use a computer UK UNICEF uncrowded unfamiliar underwater use up uncountable noun unknown unhappiness unlucky uncomfortable unpopular unfriendly unwelcome uncommon UFO ungrateful unhelpful usually USA unleaded unpainted um unaware unimportant unable unforgettable unhappy unload up to unpleasant university unexplored uninteresting unnecessary unkind untidy used to upstairs unhealthy umbrella uncle under undergo undergraduate underground undertake underline underneath understand unemployment unfair understanding unfortunate union unit unite universal universe unless until unusual up up-to-date upon upper upset upward urban urge us usage use used useful useless usual utmost ugly ulcer ultimate umbrage umpire unaffected unbecoming unanimous unassuming unbend uncanny uncommitted unconscionable unconscious unctuous underbid undercut uncouth underdog underscore undermine underhanded undergird underestimated underling underlying underplay underrate understate understated understatement understudy underutilized underwrite undeserved undesirable undirected unearth unearthly unexceptionable unfailing unfasten unfeigned unenlightened ungainly unflappable unfold unfounded ungrudging unguent unicorn unidimensional unification uninitiated unique unify unjustified unimpassioned uniform unimpeachable univocal unjustly unleash unmitigated unmoved unnoticed unkempt unobtrusive unpalatable unprecedented unprepossessing unpremeditated unproductive unqualified unravel unpretentious unprincipled unprovoked unregenerate unregulated untapped unremitting unrepentant unrequited unreserved unscathed unscented unscrupulous unscrupulousness unseemly unsettling unsettle unsound unspoiled unspotted untold untoward upgrade untutored unwarranted unwieldy unwitting unwonted Utopia unworldly upbraid Utopian upheaval uphold upright upstage uproar uproarious usury utilitarian