'unripe' originates from Old English, specifically the word 'unrīpe', where 'un-' meant 'not' and 'rīpe' meant 'ripe'.

'unrīpe' changed from Old English word 'unrīpe' and eventually became the modern English word 'unripe'.

Initially, it meant 'not ripe', and this meaning has largely remained the same in modern usage.