'mislabel' originates from the prefix 'mis-' meaning 'wrongly' and the word 'label' from Middle English 'label', which meant 'a small piece of cloth'.

'mislabel' changed from the Middle English word 'label' and eventually became the modern English word 'mislabel'.

Initially, it meant 'to attach a wrong label', and this meaning has largely remained the same in modern usage.