underride underripe undertend undertide undertime undertint undertone undertune underturn undirtied undonated undrained undreaded undreamed undropped unemperor unemptied unendured unentered unerudite unerupted unimmured unimpeded unimputed unionidae unionmade unionmaid unionoida unionport uniporter unipotent uniramian unitarded unitarian unitement unmade-up unmanured unmarried unmatured unmerited unmetered unminuted unmounded unmounted unmourned unmuddied unmummied unmutated unnatured unoduetre unordered unpainted unpapered unparaded unpartied unpatient unpatriot unpennied unpirated unpoinded unpointed unpreened unprepare unprinted unpropped unprudent unputtied unradiant unreadier unrepined unreputed unretired unripened unrotated unrounded unruinate untainted untapered untarried unteinded unteinted untempred untempted untempter untenured untermann unterreit untorture untrained untrapped untreated untrended untrimmed untripped untrodden untutored unu-merit ununtrium unununium unuttered up-and-up up-minded up-or-out up-putter upandadam upandatem upandatit upapurana upinniemi upmounted uponatime upparatti uppermore upperpart upperramp uptrained uran-utan uraniidae uraniinae uraninite urdupoint ureameter uredineae uredinium uredinoid ureometer urinarium urination urmenetea uromedina uropodoid urumpirai utriainen uttaradit uttarpara uttermore