Gynog, a. wearing a gown
Gynt, adv. formerly of yore
Gynydd, n. a gunner
Gyr, n. a drive; an impulse; an onset, a drove
Gyrddu, v. to act vehemently
Gyrddwynt, n. a hurricane
Gyrfa, n. a drive, a course
Gyrfarch, n. a race-horse
Gyrferth, n. a breathing out
Gyrferthu, v. to breath out