'antidogmatic' originates from Modern English, specifically formed from the Greek-derived prefix 'anti-' (from Greek 'anti' meaning 'against') combined with 'dogmatic' (from Latin 'dogmaticus' via Greek 'dogmatikos').

'antidogmatic' was formed in Modern English by combining 'anti-' + 'dogmatic'. The element 'dogmatic' comes from Latin 'dogmaticus', which in turn comes from Greek 'dogmatikos', from 'dogma' meaning 'opinion' or 'that which seems good', and ultimately from Greek 'dokein' meaning 'to seem, to think'.

Initially used to indicate opposition to established doctrines (often in theological contexts); over time it has broadened to mean a general opposition to rigid, unquestioning beliefs or attitudes.