U字開頭的單詞或詞組
underwoodUnion of Soviet Socialist Republicsumbraunattractiveunabashedupon my wordupperclassmanunclaimedunearthlyunjustifieduglilyundrawunorthodoxunmarriedunit costultimate designunlistedunder footunmatchableUBunderwritingunshakenutility powerupper extremityunfreezeunwittingunit vectorunderreportumberunimaginableunder the control ofunadjustedunaffectedunsolvedultrasonographyup the riverunburdenurinary bladderuncleanunwrittenunfeasibleunwound
