regenerate (adj.)

mid-15c., from Latin regeneratus, past participle of regenerare "bring forth again" (see regeneration).

regenerate (v.)

1550s, back-formation from regeneration or else from Latin regeneratus, past participle of regenerare "bring forth again" (see regeneration). Originally religious; of body parts from 1590s. Related: Regenerated; regenerating. Replaced earlier regeneren (c. 1400), from Old French regenerer.