professional
A2Adjektiv/US /prəfˈɛʃənəl/ prəf-ĔSH-ən-əl; UK /prəfˈɛʃənəl/ prəf-ĔSH-ən-əl/
Of or pertaining to a profession, or calling; conforming to the rules or standards of a profession; following a profession; as, professional knowledge; professional conduct.
