'professionally-treated' originates from the combination of 'professionally' and 'treated'. 'Professionally' comes from 'profession', which originates from Latin 'professio', meaning 'public declaration'. 'Treated' comes from Old French 'traitier', meaning 'to handle or deal with'.

'Professionally' evolved from the Latin 'professio' through Old French 'profession', and 'treated' evolved from Old French 'traitier'.

Initially, 'professionally' meant 'pertaining to a profession', and 'treated' meant 'handled'. Over time, the combination evolved to mean 'handled by a professional'.