- y-
- y- [ē, i][ME y-, i- < OE ge-, perfective prefix (basic sense “together”): for IE base see COM-] [Archaic] prefix Archaicforming, together with the appropriate inflectional change in the base, the past participle of verbs: its use, as a poetic archaism, survived until the end of the 16th cent. [yclept]
English World dictionary. V. Neufeldt. 2014.