'siren' originates from Greek, specifically the word 'seirēn', where 'seirēn' referred to the mythological creatures known for their enchanting music.

'seirēn' transformed into the Latin word 'sīrēna', and eventually became the modern English word 'siren' through Old French.

Initially, it referred to mythological creatures, but over time it evolved to include devices that emit loud warning sounds.