someone who is not competent to take effective action
"The new manager proved incompetent when he failed to address the security breach despite having full authority over the system."
A person who is incompetent.
"The manager was finally fired after it became clear he was simply incompetent at his job."
legally not qualified or sufficient
"a wife is usually considered unqualified to testify against her husband"
"incompetent witnesses"
not qualified or suited for a purpose
"an incompetent secret service"
"the filming was hopeless incompetent"
showing lack of skill or aptitude
"a bungling workman"
"did a clumsy job"
"his fumbling attempt to put up a shelf"
Unskilled; lacking the degree of ability that would normally be expected.
"The new manager was so incompetent at organizing the team meetings that everyone eventually stopped showing up on time."