'antimodel' originates from Greek (prefix) and Old French/Latin (root), specifically the Greek prefix 'anti-' meaning 'against' and the Old French/Latin word 'model' (from Latin 'modellus'/'modulus'), where 'modulus' meant 'a small measure' or 'standard'.

'antimodel' is a modern English compound formed from the prefix 'anti-' (from Greek 'anti') and 'model' (from Old French 'model', from Latin 'modellus'), combining to mean 'against a model' or 'counter-model'.

Initially formed to express 'against the model' or 'opposed to a model', it has come to mean specifically a 'counterexample' or 'negative example' and, in technical contexts, a deliberately flawed model for testing.