Un-fad-ing, anniflanol, anwywol
Un-faith-ful, anffyddlon, twyllodrus
Un-feel-ing, annheimladol, dideimlad
Un-for-seen, heb ei ragweled
Un-friend-ly, anghyfeillgar
Un-fruit-ful, anffrwythlawn, diffrwyth
Un-god-ly, annuwiol, didduw
Un-grace-ful, anheledliw, anhardd
Un-grate-ful, anniolchgar, diddiolch
Un-ground-ed, disail, disylfaen