'bachelorism' originates from English, specifically formed from the noun 'bachelor' plus the suffix '-ism', where 'bachelor' originally referred to a young knight or novice and '-ism' meant 'state, condition, or practice'.

'bachelor' came into English from Old French 'bacheler' / 'bachelerie' (Middle English 'bachelere'), ultimately traceable to Medieval Latin 'baccalarius' (or 'baccalari(us)'), and later English formed the abstract noun 'bachelorism' by adding the productive suffix '-ism'.

Initially, 'bachelor' meant 'young knight' or 'junior person in a social order', then shifted to mean 'an unmarried man'; over time the derived term 'bachelorism' came to mean 'the state or practice of being a bachelor' or the associated lifestyle.