U字開頭的單詞或詞組
uberutensiluneaseukuleleULSIuser nameundertakingunevenusanceunspoiltutilitarianunsuspectedungratefulunbounduncoolunderstateundeclaredunsettleuglinessuntouchableunderpaidUnivacuttererunlearnupheldunder the sununabridgedunsupervisedureterU.s. dollaruncontrollableuraniumunrestricteduninterestinguser interfaceunequaledunannouncedunfairnessuser friendlyunder sealuneventfuluphill