The kanji 戸 primarily represents a "door" or "entrance." It signifies a physical barrier that allows access to or from a space, such as a room, house, or building. It can also imply a household or family unit residing within a dwelling.

・On-yomi (音読み): コ (ko) ・Kun-yomi (訓読み): と (to)

⚫︎玄関戸 Translation: Entrance door/ front door ⚫︎一戸建て Translation: Detached house (one door built) ⚫︎雨戸 Translation: Rain shutter

The kanji 戸 is a pictograph. It depicts a single-leaf door, viewed from the side. The vertical line represents the door itself, and the horizontal line at the top symbolizes the door's frame or lintel. The character's simple form directly reflects its meaning.