keyhole
🇺🇸
/ˈkiːhəʊl/
🇬🇧
/ˈkiːhəʊl/
a small hole where you put a key to unlock something
She peeked through the keyhole to see if anyone was in the room.
部屋に誰かがいるかどうかを見るために、彼女は鍵穴から覗いた。