'ignoramus' originates from Latin, specifically the word 'ignoramus,' where 'ignorare' meant 'we do not know.'

'ignoramus' was used in English legal jargon to indicate a lack of evidence, and eventually became the modern English word 'ignoramus' to describe an ignorant person.

Initially, it meant 'we do not know,' but over time it evolved into its current meaning of 'an ignorant person.'