Un-bend, dadblygu
Un-bound, afrwym, dirwym, rhydd
Un-bred, anhyddysg, diddysg, difoes
Un-cle, ewythr, ewythyr
Un-clean, aflan, budr, brwnt
Unc-tion, eneiniad
Un-der, dan, tan, oddi tan, is; tanodd
Un-do, dadwneud; dattod; dyfetha
Un-done, dadwneuthuredig
Un-dress, amwisg: dadwisgo, diosg