'antimonopolization' originates from Modern English, specifically from the prefix 'anti-' (from Greek 'antí-' meaning 'against'), the word 'monopoly' (ultimately from Greek 'monopolion' via Late Latin and Old French, where 'mono-' meant 'single' and the root related to 'selling' meant 'to sell'), and the suffix '-ization' (from Late Latin/Greek formations denoting action or process).

'monopoly' came into English via Middle French and Late Latin from Greek 'monopolion'; the verb 'monopolize' was formed in Modern English from 'monopoly', and 'antimonopolization' developed by combining the prefix 'anti-' with 'monopolize' plus the noun-forming suffix '-ation' (later standardized as '-ization').

Initially, the component parts literally conveyed 'against single seller'; over time the combined term became a technical legal and policy term referring to measures, laws, or actions to prevent or limit monopolies in markets.