Cru-el-ty, creulondeb, mileindra
Cul-pa-ble, beius, ar y cam; euog
Cul-ti-vate, diwyllio, amaethu; gwareiddio
Cum-ber-some, rhwystrus; beichiol; cymmysg
Cur-a-ble, gwelladwy, iachadwy
Cu-ri-ous, cywrain manwl; ymchwilgar
Cur-ren-cy, cylchrediad, treigliad, arian treigl
Cur-va-ture, camedd, crymedd
Cus-to-dy, cadwraeth; dalfa, carchar
Cus-tom-er, prynwr, cwsmer, derbynydd