'methoxybenzoylated' is formed from the chemical components 'methoxy' + 'benzoyl' + the verb-forming suffix '-ate' and the past-participle/adjective suffix '-ed'. 'Methoxy' ultimately comes from 'methyl' (Neo-Latin/Modern chemical coinage) combined with 'oxy' (from Greek 'oxys', used in chemistry to indicate oxygen-containing groups), and 'benzoyl' derives from 'benzoin' (from Medieval Latin/Arabic via earlier sources) with the suffix '-oyl' used to name acyl groups.

'methoxybenzoylated' developed by compounding established chemical morphemes in Modern English chemical nomenclature: 'methyl' → 'methoxy' (addition of an oxygen linkage), 'benzoin' → 'benzoyl' (acyl derived from benzoin/benzoic structures), then combined and given the verbal/adjectival endings '-ate' and '-ed' to denote addition of the group.

Originally the constituent parts referred to separate chemical fragments ('methoxy' = OCH3 group; 'benzoyl' = C6H5CO- acyl group). Over time the compounded term has been used in nomenclature and literature to mean 'having had a methoxybenzoyl group introduced' or 'bearing that substituent'.