Crip-ple, cloff, efrydd: cloffi, efryddu
Cri-sis, eithafnod; argyfwng
Crit-ic, beirniad; beirniadol: beirniadu
Crotch-et, crymfach; corfanig
Crown-ing, coroniad; perffeithiad
Cru-el, creulawn, ffyrnig, ysgeler
Crum-ble, briwio, briwsioni
Cru-sade, croessawd, rhyfel y groes
Crys-tal, crisial; crisialaidd
Cube-root, trysawdd; trysoddiaeth