Home / Vocabulary / 沸 沸 Kanji meanings and readings 沸 N2 seethe; boil; ferment; uproar; breed On readingフツ Kun readingわ.く、わ.かす Radical水 Related vocabulary ✦Illustration in preparation 沸かす N4 わかす to boil; to heat ✦Illustration in preparation 沸く N4 わく to boil; to grow hot; to get excited ✦Illustration in preparation 沸騰 N1 ふっとう boiling; seething