1250-1300; (adj.) Middle Englishcountrefet false, forged < Anglo-Frenchcuntrefet,Old Frenchcontrefait, past participle of conterfere to copy, imitate, equivalent to conter-counter- + fere to make, do ≪ Latinfacere (see fact); (v.) Middle Englishcountrefeten, verbal derivative of countrefet
late 13c., from O.Fr. contrefait "imitated," pp. of contrefaire "imitate," from contre- "against" + faire "to make, to do" (from L. facere; see factitious). M.L. contrafactio meant "setting in opposition or contrast." The verb is from late 13c.