'non-bloody' originates from the prefix 'non-' meaning 'not' and the word 'bloody', which comes from Old English 'blōdig', meaning 'covered or stained with blood'.

'blōdig' transformed into the Middle English word 'blodi', and eventually became the modern English word 'bloody'. The prefix 'non-' was added to form 'non-bloody'.

Initially, 'bloody' meant 'covered with blood', but over time, 'non-bloody' evolved to mean 'not involving bloodshed'.