Ieithio, v. to form a phrase
Ieithiog, a. having language
Ieithogi, v. to form a phrase
Ieithol, a. relating to speech
Ieithydd, n. linguist
Ieithyddiacth, n. philology
Ieithyddu, v. to form speech
Ieithyddwr, n. linguist
Ierthi, n. driving-rod; goad
Iesin, a. radiant, glorious; fair