'self-heal' originates from Old English, specifically the word 'selfhǣlan,' where 'self' meant 'oneself' and 'hǣlan' meant 'to heal.'

'selfhǣlan' transformed into the Middle English word 'selfhele,' and eventually became the modern English word 'self-heal.'

Initially, it meant 'to heal oneself,' and this meaning has largely remained the same in modern usage.