na-adjective, noun which may take the genitive case particle 'no', noun
incomplete; imperfect; insufficient; dysfunctional
Formal Sino-Japanese word for a state that is not complete, adequate, or functioning properly. Often used in compounds; in casual contexts, 不十分 or うまく機能していない may sound plainer.
不全な制度を見直す必要がある。
We need to review the incomplete system.
この組織は機能不全に
This organization has fallen into dysfunction.
父は心不全で入院した。
My father was hospitalized with heart failure.
Means a specific defect or flaw; 不全 can describe a broader state of insufficiency or dysfunction.
A Sino-Japanese compound written with 不, 'not,' and 全, 'whole; complete,' giving the idea of not being complete or not functioning fully.