'mistaker' originates from the verb 'mistake', which comes from Middle English 'mistaken', from Old Norse 'mistaka', where 'mis-' meant 'wrongly' and 'taka' meant 'to take'.

'mistake' changed from the Old Norse word 'mistaka' and eventually became the modern English word 'mistake', from which 'mistaker' and its plural 'mistakers' are derived.

Initially, it meant 'to take wrongly', but over time it evolved into its current meaning of 'to make an error or be wrong about something'.