'non-professionalism' originates from the prefix 'non-' meaning 'not' and the word 'professionalism,' which comes from 'professional,' derived from Latin 'professio,' meaning 'public declaration.'

'non-professionalism' evolved from the combination of 'non-' and 'professionalism' to describe the absence of professional qualities.

Initially, it meant 'not being professional,' and this meaning has largely remained the same in modern usage.