incompetent
US /ɪnˈkɑ:mpɪtənt/
・UK /ɪnˈkɒmpɪtənt/
B2
adjective
- Not having the skill or ability to do a thing well
- Generally incapable or ineffective.
- Not having the necessary skills or abilities to do something successfully.
noun
- Person who is completely unable to do something