Gwydrin, a. vitreous
Gwydro, v. to do with glass
Gwydrogi, v. to turn to glass
Gwydrol, a. vitreous, glassy
Gwydroli, v. to vitrify
Gwydrwr, n. a glazier
Gwydryn, n. a drinking glass
Gwydus, a. of a stubborn bent
Gwydd, presence; also cognition
Gwydd, n. trees; frame of wood