U字開頭的單詞或詞組
usher inunfoldingunder the circumstancesunrestrainedundergoneuglifyunfortunateunicornunlikeuse upunemployedUUTunveilur-underneathuniquenessunderestimateunderlineuntidyunderwentutilizationuncommonUTunhealthyurge sb to do sthunleashunsupportedunpredictableunrecognizedunderwearunder the tableurbanizationupunbearableupdatingunawareunusuallyuppercaseunfamiliarunavailableundouniversal grammar
