'professionally-built' originates from the combination of 'professionally' and 'built', where 'professionally' is derived from 'profession', meaning 'a paid occupation', and 'built' is the past participle of 'build', meaning 'to construct'.

'professionally' evolved from the Latin word 'professio', and 'built' from the Old English 'byldan'.

Initially, 'professionally' meant 'pertaining to a profession', and 'built' meant 'constructed'. Together, they evolved to mean 'constructed by a professional'.