“Seethe / Boil / Ferment / Uproar” in Japanese is 沸, read futsu, wa (ふつ, わ). 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).
What does 沸 mean?
| 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) |
沸 is read futsu (ふつ) or wa (わ) depending on the word.
Same sound, different character — the classic trap. Compare them side by side: