PEEPHOLE
Meaning of PEEPHOLE in English
peep ‧ hole /ˈpiːphəʊl $ -hoʊl/ BrE AmE noun [countable]
a small hole in a door or wall that you can see through ⇨ spy hole
Longman Dictionary of Contemporary English.
Longman - Словарь современного английского языка.
2012