adjective
lacking or marked by lack of expert skill or finish
an amateurish actor
Synonyms: dabbling, dilettante, dilettantish, dilettantist, jackleg, unaccomplished, unfinished, ungifted, unskilled
Related Word: clumsy, crude, green, raw, untutored; defective, deficient, faulty, flawed
Contrasted words: accomplished, expert, gifted, skilled
Antonyms: professional