Cyflymder, n. quickness
Cyflymiad, n. acceleration
Cyflymu, v. to accelerate
Cyflyn, a. mutually adhering
Cyflyniad, n. cohesion
Cyflys, a. courtly, courtlike
Cyfnai, n. a third cousin
Cyfnaid, a. of mutual loan
Cyfnaith, n. pledge
Cyfnaws, n. a common nature; of the same quality