Meaning & readings

seethe, boil, ferment, uproar, breed

On’yomi フツ
Kun’yomi わ.く、わ.かす

Origin

This character combines water on the left with a sound hint on the right. The water component makes sense because the main meaning involves liquids boiling or bubbling up. The right part, pronounced roughly like "futsu," is a sound hint that tells you how to say the word but doesn't add to the meaning itself. Together, the character visually suggests the idea of water doing something active and energetic — which matches the bubbling, fermenting, and turbulent senses of the word.

AI-generated (claude-haiku-4-5), not yet reviewed. Formation type (automated guess): Phono-semantic (meaning + sound hint).

8 strokes

Components

  • radical left
  • sound hint right

A sound hint component points at the character’s pronunciation, not its meaning — don’t read a meaning into it.

Common words

  • 沸騰 ふっとう boiling; seething
  • 沸く わく to grow hot (e.g. water); to boil
  • 沸かす わかす to boil; to heat (a liquid)
  • 湯沸かし器 ゆわかしき water heater; water boiler

Reference

Strokes
8
Kangxi radical
85
Grade
Jōyō (secondary school)
Frequency rank
#1709 (newspapers)
Former JLPT
level 2
Unicode
U+06CB8