Cywelyes, n. a concubine
Cywelyog, a. having a bedfellow
Cywelogaeth, n. concubinage
Cywen, n. a young hen
Cywenig, n. a little pullet
Cywer, n. a curdler; a rennet
Cywerth, n. equivalence
Cywerthol, a. equivalent
Cywerthu, v. to bargain
Cywerthyddu, v. to estimate