鍵かぎ穴あな

noun

keyhole

The hole in a lock where a key is inserted.

• 鍵かぎ穴あなに鍵かぎを差さし込こんだ。

  I inserted the key into the keyhole.

• 鍵かぎ穴あなから中なかを覗のぞく。

  Peek inside through the keyhole.