'antiquify' originates from English, formed from 'antique' + the verb-forming suffix '-fy', where 'antique' comes from Latin 'antiquus' meaning 'old' and '-fy' ultimately derives from Latin 'facere' meaning 'to make'.

'antique' entered English via Old French 'antique' from Latin 'antiquus'; the productive suffix '-fy' (from Old French/Latin roots ultimately tied to Latin 'facere') was attached in modern English to form 'antiquify'.

Initially it meant 'to make or become old; to give an antique appearance', and over time this core meaning has largely remained, though use can extend to 'render archaic or obsolete' in some contexts.