'non-adversarial' originates from the prefix 'non-' meaning 'not' and the word 'adversarial,' which comes from the Latin 'adversarius,' meaning 'opponent.'

'adversarial' changed from the Latin word 'adversarius' and eventually became the modern English word 'adversarial.'

Initially, 'adversarial' meant 'pertaining to an opponent,' but over time, 'non-adversarial' evolved to mean 'not involving conflict.'