| adjective | not having or showing or requiring special skill or proficiency “unskilled in the art of rhetoric” |
| adjective | lacking professional skill or expertise “a very amateurish job” |
| adjective | not doing a good job “incompetent at chess” |
| amateurishness | noun | something that demonstrates a lack of professional competency |
| amateur | noun | an athlete who does not play for pay |
| incompetency | noun | lack of physical or intellectual ability or qualifications |
| incompetence | noun | lack of physical or intellectual ability or qualifications |