- identical (adj.)
[identical 词源字典] - 1610s, as a term in logic, from Medieval Latin identicus "the same," from Late Latin identitas "identity, sameness," ultimately from comb. form of Latin idem "the same" (from id "it, that one;" see id) + demonstrative suffix -dem. General sense of "being the same or very similar" is from 1630s. Replaced Middle English idemptical (late 15c.), from Medieval Latin idemptitas "identity," from Latin idem. Related: Identically.[identical etymology, identical origin, 英语词源]
- identicalness
- "The quality of being identical; sameness; identity", Late 17th cent. From identical + -ness. Compare earlier identity.
