1.
incompetent, incapable, useless
Lacking ability, talent, or competence. A harsh word used to describe someone who cannot perform their duties or role effectively. Carries strong negative connotation.
Common patterns
Functions as a な-adjective: 無能な人 (an incompetent person). Also used as a noun: 無能さ (incompetence), 無能を嘆く (to lament one's incompetence).
Usage
A strong, directly critical word. Using it about someone else is quite harsh, though it appears frequently in fiction and political criticism. When used about oneself, it expresses deep self-reproach. Combines 無 (without) and 能 (ability).
Common collocations
Related Words
Antonym:
有能 (capable, competent)
Compare:
役立たず (good-for-nothing)
Compare:
無策 (lack of a plan)