'antiquate' originates from Latin, specifically the word 'antiquatus', where 'antiqu-' meant 'old' (from 'antiquus').

'antiquate' changed from Late Latin/Middle French formations (e.g. Latin 'antiquatus' / French influence) and entered English usage in the Early Modern period as 'antiquate' meaning 'to make old'.

Initially it meant 'to make or treat as ancient/old'; over time it acquired the common sense 'to make obsolete' or 'to render out of date'.