'archmockery' originates from English, specifically the prefix 'arch-' (from Greek 'arkhē'/'arkhos'), where 'arch-' meant 'chief, principal', and the noun 'mockery' from Old French 'moquer', where 'moquer' meant 'to ridicule'.

'mockery' changed from Old French 'moquer' to Middle English forms (e.g. 'mokkery') and eventually became the modern English 'mockery'; 'arch-' comes from Greek 'arkhē'/'arkhos' via Latin/Old English as a productive prefix; these elements were later combined in modern English to form the compound 'archmockery'.

Initially the components meant 'chief/principal' (arch-) and 'to ridicule' (mockery), but combined in modern usage to denote a specific kind of exaggerated, superior mockery ('extreme or arch mockery').