'bronchial' originates from the Greek word 'bronkhia,' which is the plural of 'bronkhion,' a diminutive of 'bronchos,' meaning 'windpipe.'

'bronkhia' transformed into the Latin word 'bronchia,' and eventually became the modern English word 'bronchial.'

Initially, it referred specifically to the 'windpipe,' but over time it evolved to describe anything related to the bronchi.