Tywynol, a radiant, shining
Tywynu, v. to radiate, to shine
Tywynwg, n. radiancy, splendour
Tywynygiad, n. illumination
Tywyngu, v. to illuminate
Tywys, n. a leading, a guidance
Tywysel, n. plug, stopple, stopper
Tywysg, n. a procession
Tywysgiad, n. a proceeding
Tywysgo, v. to proceed