'misconfirm' originates from the prefix 'mis-' meaning 'wrongly' and the verb 'confirm' from Latin 'confirmare', meaning 'to strengthen' or 'to establish'.

'confirmare' transformed into the Old French word 'confirmer', and eventually became the modern English word 'confirm'. The prefix 'mis-' was added to form 'misconfirm'.

Initially, 'confirm' meant 'to establish the truth or correctness of something', and with the prefix 'mis-', it evolved to mean 'to establish incorrectly'.