玄関の鍵

front door key

→ 玄関
phrase Rare #42,132
front door key Depending on context, 鍵 can refer to either the key or the lock. In 鍵をかける, it means to lock the door.
JA: 出かける前に、玄関の鍵を確認してください。
EN: Please check the front door lock before you leave.

玄関の鍵締めるのを忘れてしまった

I forgot to lock the front door.

玄関の鍵かけた

I locked the front door.