'antiwarlike' originates from English, combining the prefix 'anti-' (from Greek 'anti' meaning 'against') with 'warlike' (from 'war' + suffix '-like').

'war' comes into English via Old North French/Old English (Old French werre/Old English wyrre), and the adjectival suffix '-like' comes from Old English 'līc' meaning 'like'; the productive prefix 'anti-' (from Greek via Latin and French) was later attached to form compounds such as 'anti-war' and 'antiwarlike'.

Initially the elements meant 'against' (anti-) and 'of or like war' (warlike); together they have consistently meant 'against war' or 'not warlike', with little change in core sense.