Meaning & readings

charcoal, coal

On’yomi タン
Kun’yomi すみ

Origin

This character combines two visual ideas to represent charcoal. The top part, a mountain shape, suggests the solid, dark material itself. The bottom part represents fire or ash, pointing to how charcoal is made by burning wood and other materials until they turn black and crumbly. Together, the combination pictures something that comes from fire and burning—specifically the dark residue left behind. This is why the character evolved to mean charcoal or coal.

AI-generated (claude-haiku-4-5), not yet reviewed. Formation type (automated guess): Compound ideographic (combined meanings).

9 strokes

Components

  • radical top
  • meaning part bottom

Common words

  • 採炭 さいたん coal mining; coal extraction
  • 薪炭 しんたん wood and charcoal; fuel
  • 石炭 せきたん coal
  • 炭酸 たんさん carbonic acid
  • 炭素 たんそ carbon (C)
  • 泥炭 でいたん peat
  • 木炭 もくたん charcoal
  • 炭鉱 たんこう coal mine; (coal) pit

Reference

Strokes
9
Kangxi radical
86
Grade
Grade 3 (Kyōiku)
Frequency rank
#1307 (newspapers)
Former JLPT
level 2
Unicode
U+070AD