'antievolutionistic' is formed from the prefix 'anti-' (from Greek 'anti' meaning 'against') + 'evolution' (from Latin 'evolutio' via French/Latin meaning 'an unrolling, unfolding') + the adjectival suffix '-istic' (from Greek/Latin via French, used to form adjectives meaning 'relating to' or 'characteristic of').

'evolution' comes from Latin 'evolutio' (from 'evolvere' meaning 'to unroll'); it entered English via Middle French 'evolution'. The combining prefix 'anti-' comes from Greek 'anti-' (ἀντί) meaning 'against'. The adjectival suffix '-istic' is from Greek '-istikos' via Latin and French '-istic'. These elements were combined in modern English to form 'antievolutionistic'.

The elements originally conveyed 'against' + 'unrolling/unfolding' + 'relating to'; together they have come to mean 'relating to or expressing opposition to the theory of evolution,' a specific ideological stance.