'adless' originates from the English word 'ad,' a short form of 'advertisement,' combined with the suffix '-less,' which means 'without.'

'Ad' is a shortened form of 'advertisement,' which comes from the Latin word 'advertere,' meaning 'to turn toward.' The suffix '-less' is of Old English origin, used to denote 'without.'

Initially, 'adless' meant 'without advertisements,' and this meaning has remained consistent in modern usage.