'antiritualistic' originates from modern English, specifically as a compound of the prefix 'anti-' (from Greek 'anti' meaning 'against') and the adjective 'ritualistic' (from Latin 'ritualis' via 'ritual' + the suffix '-istic').

'antiritualistic' is a modern coinage formed from 'anti-' + 'ritualistic'. The element 'ritual' derives from Latin 'ritualis' through Middle English 'ritual', and the adjectival suffix '-istic' was added in modern English to form 'ritualistic', which then combined with 'anti-'.

Initially used to express being 'against rituals or ritualism' in a descriptive or polemical sense; over time the compound has retained that basic meaning and is used to describe attitudes, policies, or styles that reject ceremonial/formal rites.