Coegfeddyg, n. a quack doctor
Coegfeddiginiaeth, n. quackery, empyrism
Coegfolach, n. vain boasting
Coegfran, n. a jackdaw
Coegfrwnt, a. obscene; vile
Coegio, v. to make void; to trick
Coegni, n. sauciness
Coegsiarad, n. empty talk
Coegsiared, v. to talk foolishly
Coegwr, n. a vain person