'undaunted' originates from Middle English, specifically the word 'daunten,' where 'daunt' meant 'to overcome with fear.' The prefix 'un-' negates this meaning.

'daunten' transformed into the modern English word 'daunt,' and eventually became 'undaunted' with the addition of the prefix 'un-'.

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