door · household

1. Origins, structure, and basic meaning

• Structure: 戸 has 4 strokes, the on-reading こ, and the kun-reading と. 戸 (と) means a door or door panel.
• Basic usage: 戸 names a door that opens and closes; 戸締まり (とじまり) means locking and securing doors or windows.

2. Common pitfalls and similar expressions

• A door panel and locking up
  • 戸が勢いよく閉まった means that the door slammed shut in the wind. 古い木の戸を開けると appears in the scene where opening an old wooden door lets in morning sunlight.
  • 窓の戸締まりを確認した means checked that the windows were locked. 戸締まりを担当する describes the last person leaving work being responsible for locking up.