Cydenwad, n. agnomination
Cydestyniad, n. co-extention
Cydetifedd, n. a co-heir
Cydetifeddu, v. to inherit jointly
Cydetifeddwr, n. a joint inheritor
Cydfa, n. a convention
Cydfaethiad, n. connutrition
Cydfantoli, v. to equilibrate
Cydfloedd, n. conclamation
Cydfod, n. co-existence; concord, or agreement