'airlessness' originates from the English word 'airless,' where 'air' refers to the invisible gaseous substance surrounding the earth, and '-less' is a suffix meaning 'without.'

'airless' transformed from the Old English word 'ær,' meaning 'air,' combined with the suffix '-less,' and eventually became the modern English word 'airless.'

Initially, it meant 'without air,' and this meaning has largely remained the same in modern usage.