'breath' originates from Old English, specifically the word 'brǣþ,' where 'brǣþ' meant 'odor or exhalation.'

'brǣþ' changed from Old English word 'brǣþ' and eventually became the modern English word 'breath'.

Initially, it meant 'odor or exhalation,' but over time it evolved into its current meaning of 'air taken into or expelled from the lungs.'