A part
炭
Shown as a part of 2 words so far, read one way.
たん 2 words
- 石炭せきたんcoal
石炭 · here “coal”
- 炭素たんそcarbon (C)
炭素 · here “coal”
Also written with 炭
These words contain the character in their spelling but show no breakdown that names it, so nothing is claimed about its role in them.