'antiinsurrectionally' is built from the prefix 'anti-' (from Greek 'antí', meaning 'against'), the noun 'insurrection' (from Latin 'insurrectio'), the adjective-forming suffix '-al', and the adverbial suffix '-ly'.

'insurrection' originates from Latin 'insurrectio' (from 'insurgere' = 'in-' + 'surgere' meaning 'to rise'), which passed into Middle French and then Middle English as 'insurrection'; the modern compound 'antiinsurrectional' and its adverbial form 'antiinsurrectionally' are formed in modern English by combining 'anti-' + 'insurrection' + '-al' + '-ly'.

Initially, the elements meant 'against' (anti-) and 'a rising up' (insurrectio); over time they combined into a modern formation meaning 'opposed to or intended to prevent insurrection', with the adverb meaning 'in a manner that opposes or suppresses insurrection'.