imitate: [16] Latin imitāri meant ‘make a copy of’. It was formed from the base *im-, which also lies behind the Latin ancestors of English emulate [16] and image; all three words share the basic meaning element ‘likeness’. English acquired the word via the Latin past participle imitātus. => emulate, image[imitate etymology, imitate origin, 英语词源]
1530s, a back-formation from imitation or imitator, or else from Latin imitatus. Related: Imitated; imitating. An Old English word for this was æfterhyrigan.