'untaught' originates from Old English, specifically the word 'untæht,' where 'un-' meant 'not' and 'tæht' meant 'taught or instructed.'

'untæht' transformed into the Middle English word 'untaut,' and eventually became the modern English word 'untaught.'

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