'uncouth' originates from Old English, specifically the word 'uncūth', where 'un-' meant 'not' and 'cūth' meant 'known or familiar'.

'uncūth' changed from Old English word 'uncūth' and eventually became the modern English word 'uncouth'.

Initially, it meant 'unknown or unfamiliar', but over time it evolved into its current meaning of 'lacking good manners or refinement'.