'scentlessly' originates from the word 'scentless', which is derived from 'scent', meaning 'a distinctive smell', combined with the suffix '-less', indicating 'without'.

'scentless' evolved from the Middle English word 'sent', which was borrowed from Old French 'sentir', meaning 'to smell'.

Initially, 'scentless' meant 'without a smell', and this meaning has remained consistent in modern usage.