Security Equipment Terminology

noun a small hole or opening through which one can secretly observe or spy on someone or something

• The peephole in the door allowed me to see who was outside before opening it.
• I looked through the peephole to see who was knocking on the door.
• I peeped through the peephole to check out who was at the door.
• She tried to get a peephole into his private life by asking personal questions.

adjective describing something that can be locked

• The storage cabinet comes with lockable doors to ensure security.
• I bought a lockable suitcase for my upcoming trip.
• I need to get a lockable box to keep my valuables safe.
• Her heart was like a lockable vault, guarded against any unwanted intruders.