'antiracing' originates from Greek prefix 'anti-' (from Greek 'antí') meaning 'against', combined with the English noun 'racing' (from 'race'), where 'race' ultimately comes from words like Old Norse/Italian 'ras'/'razza' meaning 'rush' or 'line'.

'antiracing' was formed in modern English by compounding the productive prefix 'anti-' with the deverbal/nominal form 'racing'. The element 'race' entered Middle English (via Old French/Italian 'razza'/'ras') and developed into modern English 'race', which then produced 'racing' as the verbal noun/gerund.

Initially the parts meant 'against' (for 'anti-') and 'rush/contest' (for 'race'); over time the compound came to mean specifically 'opposed to the institution or practice of organized racing'.