lifeblood

uncountable usually figuratively

Japanese Meaning

生命維持に必要な血液、生命そのものを象徴する血液。 / 比喩的に、存在や機能のために不可欠な要素

For many small coastal towns, fishing is the lifeblood of the community.

多くの小さな沿岸の町にとって、漁業は地域の生命線だ。

Sense（1）

Blood that is needed for continued life; blood regarded as the seat of life.

Sense（2）

(figuratively) That which is required for continued existence or function.

Gasoline is the lifeblood of the modern city.

lifebloods

（ plural ）