A part
歯
Shown as a part of 2 words so far, read 2 ways.
ば 1 word
- 虫歯むしばcavity, tooth decay
虫歯 · here “tooth” (from は)
は 1 word
- 歯医者はいしゃdentist
歯医者 · here “tooth”
Also written with 歯
These words contain the character in their spelling but show no breakdown that names it, so nothing is claimed about its role in them.