All 6 Uses

competent
in
The Bourne Identity
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Twenty minutes ago their trap fell apart; there's got to be confusion, recriminations, accusations of incompetency, or worse.†
Chpt 14

incompetency = inability to do things sufficiently

standard prefix: The prefix "in-" in incompetency means not and reverses the meaning of competency. This is the same pattern you see in words like invisible, incomplete, and insecure.
Or incredibly incompetent.†
Chpt 16

incompetent = not sufficiently capable

standard prefix: The prefix "in-" in incompetent means not and reverses the meaning of competent. This is the same pattern you see in words like invisible, incomplete, and insecure.
Frankly, we don't think you're competent.†
Chpt 17 *

competent = sufficiently capable
"Competent?" repeated Lavier, as if she did not believe what she had heard.†
Chpt 17
The Republic was corrupt, the military incompetent, the Maginot a joke.†
Chpt 25

incompetent = not sufficiently capable

standard prefix: The prefix "in-" in incompetent means not and reverses the meaning of competent. This is the same pattern you see in words like invisible, incomplete, and insecure.
I pay thousands-hundreds of thousands-for incompetence and failure.†
Chpt 25

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.

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.