'archaize' originates from Modern English formation, specifically from the adjective 'archaic' plus the suffix '-ize' (the suffix tracing to Greek '-izein' via Late Latin/Old French), where 'archaic' ultimately comes from Greek 'arkhaîos' meaning 'ancient'.

'archaize' changed from the adjective 'archaic' (borrowed into English via Latin/French from Greek 'arkhaîos') with the productive verb-forming suffix '-ize' to produce the verb 'archaize' in Modern English; the derived past form became 'archaized'.

Initially the root 'archaic' meant 'relating to ancient times' (i.e. 'ancient' or 'old'), but over time the verb 'archaize' came to mean 'to make something seem ancient' or 'to render old-fashioned', a shift from being descriptive to an active process.