湧 means “gush, well up”

わく · waku

Also: boil, ferment, seethe, uproar

Kun'yomi (Japanese reading): わく
On'yomi (Chinese reading): ユウ, ヨウ, ユ

JLPT N1 · Taught in secondary school · 12 strokes

The story

Water (氵) beside 勇, courage: water bursting out of the ground as if with sudden nerve. 湧く is to well up, like a hot spring or a feeling: 湧き水 is spring water, and 興味が湧く is interest stirring.

Used in 湧く (waku, to well up/gush), 湧き水 (wakimizu, spring water), and 湧水 (yuusui, spring water)

湧 means “gush, well up”

The story

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