'steamy' originates from the English word 'steam,' which comes from the Old English word 'stēam,' meaning 'vapor' or 'fume.'

'stēam' transformed into the Middle English word 'steme,' and eventually became the modern English word 'steam,' leading to the adjective 'steamy.'

Initially, it meant 'full of vapor,' but over time it evolved to include a sensual connotation.