'classlessness' originates from English, specifically the word 'class' plus the suffixes '-less' and '-ness' (where '-less' meant 'without' and '-ness' forms a noun meaning 'state or quality').

'class' was borrowed into English from Old French 'classe', ultimately from Latin 'classis' meaning 'a division or group'. The adjective 'classless' was formed in modern English by adding '-less' to 'class', and 'classlessness' was created by adding the noun-forming suffix '-ness' to 'classless'.

Initially, 'class' referred to a division or group (especially a division of society). Over time the compound 'classlessness' retained the sense 'without social classes' and later also acquired a secondary sense referring to a lack of refinement or 'taste' in personal behavior.