peephole

• Небольшое отверстие, обычно в двери или печи, через которое можно смотреть или наблюдать, оставаясь незамеченным.

A small opening, typically in a door or an oven, through which one can look or observe without being fully seen.

1. Small viewing openingB1formal

   A small hole in a door, wall, or other surface through which one can look to see who or what is on the other side.

   Глазок

   • She checked the peephole before opening the door.
   • The apartment door had a peephole for security.
   • He looked through the peephole to see who was knocking.

   Синонимыspyhole