'unblemished' originates from Middle English, specifically the word 'blemisshen,' where 'un-' meant 'not' and 'blemish' meant 'to spoil or damage.'

'blemisshen' transformed into the modern English word 'unblemished' by adding the prefix 'un-' to indicate the absence of blemishes.

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