A part
布団
Shown as a part of 1 word so far, read one way.
ぶとん 1 word
- 座布団ざぶとんcushion (Japanese)
座布団 · here “futon” (from ふとん)
Also written with 布団
These words contain the character in their spelling but show no breakdown that names it, so nothing is claimed about its role in them.