All 3 Uses

competent
in
Nine Stories
(Auto-generated)

They looked neither strong nor competent nor sensitive.†
Story 3 *

competent = sufficiently capable
Then the Chief took over, revealing what had formerly been a well-concealed flair for incompetence.†
Story 4

incompetence = inability to do things sufficiently

standard prefix: The prefix "in-" in incompetence means not and reverses the meaning of competence. This is the same pattern you see in words like invisible, incomplete, and insecure.
It is possible that Father Zimmermann made you resign from the school because he thought it might interfere with your being a competent nun.†
Story 8

competent = sufficiently capable

Definitions:

(1) (competent)
capable (able to do something in a generally satisfactory manner) -- sometimes specifically to have legal capability
(2) (meaning too rare to warrant focus)
In the field of law, competent has the specialized meaning of being legally qualified to do something such as to be mentally fit to make reasonable decisions; or to have jurisdiction or authority to take an action.

In classic literature, a competency can refer to having an income or assets to support living expenses.