'anti-ministerially' originates from modern English, formed by the prefix 'anti-' (from Greek 'anti' meaning 'against') attached to 'ministerial' (from 'minister', ultimately from Latin 'minister' meaning 'servant/attendant', + adjectival suffix '-ial').

'minister' came into English via Latin 'minister' and Old French 'ministre' into Middle English 'ministre' and then 'minister'; 'ministerial' developed as the adjective meaning 'relating to a minister or ministry'; the prefix 'anti-' (Greek via Latin/Old French) combined with 'ministerial' to make 'anti-ministerial', and the adverbial form 'anti-ministerially' was formed by adding '-ly'.

Originally 'minister' meant 'servant' or 'attendant'; over time 'minister' and 'ministerial' shifted to mean 'relating to a government minister or ministry'; with the prefix 'anti-' the compound now conveys opposition to ministers or ministerial policies; the adverbial form means 'in a manner opposed to ministers/ministry'.