Un-der-tak-er, ymgymerwr, cymerwr
Un-der-tak-ing, gorchwyl, ymgymeriad
Un-der-val-ue, dibrisio, difrïo
Un-der-writ-er, ymrwymwr, digolliannwr
Un-dis-put-ed, diamheuol, diddadl
Un-du-lat-ed, rhithdonog, ar wedd tonau
Un-du-la-tion, tonogiad
Un-du-ti-ful, anufudd, anufuddgar
Un-ea-si-ness, anesmwythder, anhawsder
Un-ex-pect-ed, annysgwyliedig