'unsocial' originates from the prefix 'un-' meaning 'not' and the word 'social' from Latin 'socialis', meaning 'of companionship'.

'socialis' transformed into the Old French word 'social', and eventually became the modern English word 'social'. The prefix 'un-' was added to form 'unsocial'.

Initially, it meant 'not social or not seeking company', and this meaning has largely remained the same in modern usage.