'expertly-used' originates from the combination of 'expertly' and 'used', where 'expertly' is derived from 'expert', meaning 'a person with a high level of knowledge or skill', and 'used' is the past participle of 'use', meaning 'to employ for a purpose'.

'expertly' evolved from the Latin word 'expertus', meaning 'tried, tested', and 'used' comes from the Old French 'user', meaning 'to employ'.

Initially, 'expertly' meant 'in a manner of an expert', and 'used' meant 'employed'. Together, they convey the idea of something being employed with skill.