沸 — Seethe / Boil / Ferment / Uproar

Master (高手)ふつ, わ

Radical ⽔ · radical 85 The building block this kanji is filed under

沸 (readings: ふつ, わ; Japanese kanji) means “Seethe / Boil / Ferment / Uproar”. It is a Jōyō kanji taught in Japanese secondary school (junior & senior high) — the 高手 · Master tier beyond the grade 1–6 Kyōiku set, and appears in words such as 沸騰 (boiling).

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What does 沸 mean?

Full details, readings & example

Kanji	沸
Meaning	Seethe / Boil / Ferment / Uproar
Readings	ふつ, わ
Grade	Master (高手 · secondary school)
Curriculum	Jōyō kanji · Japanese secondary school (JLPT N1–N2)
Example	沸騰 (boiling)

How to read 沸

沸 is read ふつ or わ depending on the word.

Words with 沸

沸騰sôi sục

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Updated: 2026-07-22