Cywilydd, n. shame, disgrace
Cywilyddgar, a. shameful
Cywilyddiad, n. a shaming
Cywilyddio, v. to shame
Cywilyddus, a. shameful
Cywir, a. correct, sincere
Cywirdeb, n. correctness
Cywiriad, n. a loyalist
Cywirio, v. to perfect; to fulfil; to be sincere
Cywrain, a. skilful; accurate