antiquate v.

1530s, "aged, venerable;" 1540s, "having existed in ancient times," from French antique "old" (14c.), from Latin antiquus (later anticus) "ancient, former, of olden times; old, long in existence, aged; venerable; old-fashioned," from PIE *anti- "before" (from root *ant- "front, forehead," with derivatives meaning "in front of, before") + *okw- "to see."

Originally pronounced in English like its doublet antic, but French pronunciation and spelling were adopted in English from c. 1700. The meaning "not modern" is from 1640s. Related: Antiqueness.

1620s, past-participle adjective from verb antiquate "make old or obsolete" (1590s), from Latin antiquatus, past participle of antiquare "restore to its ancient condition," in Late Latin "make old," from antiquus "ancient, of olden times; aged, venerable; old-fashioned" (see antique (adj.)). An older adjective in the same sense was antiquate (early 15c.), from Latin. Related: Antiquatedness.