incompetent
adj. 无能力的,不称职的;<法律>无资格的;(医)(尤指瓣膜或括约肌)无机能的
n. 无能力者
例句
He wants the power to fire incompetent employees.
他希望有权解雇不称职的雇员。
《柯林斯英汉双解大词典》
I don't think she's correct to say he's incompetent.
我认为她说他无能是不对的。
《牛津词典》
The man was a fool, he thought, or at least incompetent.
他想,那人是个傻子,或者至少是无能。