'antipatriotic' originates from the prefix 'anti-' (from Greek 'anti' meaning 'against') combined with 'patriotic' (from 'patriot' ultimately from Greek 'patriōtēs' meaning 'fellow-countryman').

'antipatriotic' was formed in English by combining 'anti-' + 'patriotic' (patriotic itself coming into English via French/Latin from Greek 'patriōtēs'), producing a straightforward compound meaning 'against patriotism'.

Initially the elements meant 'against' and 'fellow-countryman', and when combined the word has come to mean 'opposed to patriotism' or 'showing lack of patriotic feeling', a meaning that has remained stable in modern usage.