Con-den-sa-tion, dwysiad, tewhâd
Con-di-tion-al, terfyniad, ammodiad; ammodol
Con-de-scen-sion, ymddarostyngiad
Con-fed-er-ate, cynghreiriwr: cynghreirio
Con-firm-a-tion, cadarnhad, cryfhâd
Con-form-i-ty, cydffurfiad; cyssondeb
Con-ge-la-tion, cyttewychiad; rhewiad
Con-ge-ni-al, cydrywiol; naturiol
Con-grat-u-late, cydlawenhau â, cydlawenychu
Con-gre-ga-tion, cynnulleidfa