'antipatriarchally' originates from modern English, formed by the prefix 'anti-' (from Greek 'anti' meaning 'against') + 'patriarchal' (from 'patriarch' + adjectival suffix '-al') + the adverbial suffix '-ly'.

'patriarch' comes from Greek 'patriárchēs' (πατριάρχης), passed into Late Latin as 'patriarcha' and into Middle English as 'patriark', later forming the adjective 'patriarchal'; the adverbial '-ly' derives from Old English '-lic' which developed into the modern English suffix '-ly' to form adverbs like 'antipatriarchally'.

Initially the elements meant 'against' + 'rule of fathers' (i.e., opposition to paternal rule); over time the combined form evolved to mean opposition to patriarchal social structures, and the adverbial form means 'in a manner that opposes patriarchy.'