'misdiagnose' originates from the prefix 'mis-' meaning 'wrongly' and the word 'diagnose' from Greek 'diagnosis', where 'dia-' meant 'through' and 'gnosis' meant 'knowledge'.

'misdiagnose' evolved from the combination of 'mis-' and 'diagnose', which was derived from the Greek word 'diagnosis'.

Initially, it meant 'to know through wrong means', but over time it evolved into its current meaning of 'to diagnose incorrectly'.