'antiquize'
originates from English, formed from the adjective 'antique' plus the verb-forming suffix '-ize' (from Greek/Latin via French), where 'antique' ultimately came from Latin 'antiquus' meaning 'old'.

'antiquus'
(ラテン語)

Initially the roots referred simply to 'old' or 'ancient'; over time the formed verb came to mean 'to make or give the appearance of being old' rather than denoting genuine age.