A part
戸
Shown as a part of 3 words so far, read 2 ways.
と 2 words
- 戸棚とだなcupboard, cabinet
戸棚 · here “door”
ど 1 word
- 井戸いどwater well
井戸 · here “door” (from と)
Also written with 戸
These words contain the character in their spelling but show no breakdown that names it, so nothing is claimed about its role in them.