'adeptly' originates from the Latin word 'adeptus', where 'ad-' meant 'toward' and 'apisci' meant 'to attain'.

'adeptus' transformed into the French word 'adepte', and eventually became the modern English word 'adept' through Middle English.

Initially, it meant 'to attain or achieve', but over time it evolved into its current meaning of 'skillful or proficient'.