肝かん心じん要かなめ

か

ん

じ

ん

か

な

め

Meanings

1

noun which may take the genitive case particle 'no', na-adjective, noun

crucial; key; most important

Emphasizes that something is the absolutely essential core or linchpin of a matter. Often used in set phrases like 肝心要の〜 or 〜が肝心要だ.

このプロジェクト

で

肝かん

心じん

要かなめ

な

の

は

、

チームワーク

です

。

What's crucial in this project is teamwork.

健けん康こう管かん理りが長なが生いきの肝かん心じん要かなめだ。

Health management is the key to a long life.

Kanji

肝liver, pluck, nerve
心heart, mind, spirit
要need, main point, essence
腎kidney

Related words

肝かん心じん
肝心 is a common standalone word meaning 'essential' or 'vital'. 肝心要 is a more emphatic, slightly formal compound that adds 要 (keystone) to stress the absolute core importance.
重じゅう要よう
重要 is the general word for 'important'. 肝心要 is stronger and more specific, implying that without this element, the whole thing fails.

Built from

肝かん心じん+要かなめ

Written forms

肝かん心じん要かなめ
Standard kanji spelling; 肝心 (essential) + 要 (pivot/keystone).
肝かん腎じん要かなめ
Variant using 腎 (kidney); less common but still seen.

Etymology

Compound of 肝心 (かんじん, 'essential', literally 'liver and heart') and 要 (かなめ, 'pivot' or 'keystone'). The combination intensifies the meaning to 'the one absolutely indispensable thing'.