Meet 沸 in the kitchen and in the excitement of a crowd. Learn each reading with its whole word.
The idea
沸 has 8 strokes; follow the linked diagram. 沸く（わく） means to boil or become excited; 沸かす（わかす） means to bring something to a boil. 沸騰（ふっとう） names boiling.
Examples
- 湯が沸いています。The water is boiling.
- 水を沸かしてお茶を入れます。I boil water and make tea.
- 鍋の水が沸騰しました。The water in the pot has come to a boil.
- 沸騰したら、火を止めてください。When it boils, please turn off the heat.
- 会場は大きな拍手で沸きました。The venue erupted in loud applause.
- やかんの湯をもう一度沸かします。I will boil the water in the kettle again.
Read-aloud uses a synthetic Japanese voice available on your device. Voice quality and availability vary; it does not assess your pronunciation.
No Japanese device voice is available. You can still read the text and use the linked listening resources.
Watch out
With 沸く, the water itself boils; with 沸かす, someone boils it. 湧く can also be read わく, but often describes water or feelings welling up.
Try it yourself
Write the reading of 沸く in hiragana.
Show answer or example answer
わく
沸く is わく: 湯が沸く means the water boils.
Write the reading of 沸騰 in hiragana.
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ふっとう
沸騰 is ふっとう; remember the small っ and long お sound.
Choose the missing kanji: 水を＿かす ［沸／湧］.
Show answer or example answer
沸
沸 completes 水を沸かす: someone brings water to a boil.
Practice round
Answer questions, then rebuild Japanese sentences where available. We keep your score.
Write the reading of 沸く in hiragana.
Write the reading of 沸騰 in hiragana.
Choose the missing kanji: 水を＿かす ［沸／湧］.
Tap the words in the right order.
Tap the words in the right order.
Tap the words in the right order.
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Write 沸 following the diagram. Read 沸く and 沸騰 aloud, then describe boiling water with 沸かす.