Cyfarwynebu, v. to comfort
Cyfatteb, v. to correspond
Cyfattebiad, n. a corresponding
Cyfattebiaeth, n. correspondence
Cyfattebol, a. corresponding
Cyfategu, v. to uphold jointly
Cyfathrach, n. affinity, kind
Cyfathrachu, v. to join alliance, to join in matrimony
Cyfhâu, v. make whole
Cyfddydd, n. the day-spring