Longman Dictionary of Contemporary English homepage

-proof

suffix
     
-proof
1 [in adjectives] used to describe something which a particular thing cannot harm or pass through, or which protects people against that thing:
a bulletproof car
a waterproof jacket
an ovenproof dish (=that cannot be harmed by heat)
2 [in adjectives] used to describe something which cannot easily be affected or damaged by someone or something:
a childproof container
vandal-proof
3 [in verbs] to treat or make something so that a particular thing cannot harm it or pass through it, or so that it gives protection against it:
soundproof a room (=so that sound cannot get into or out of it)

Dictionary pictures of the day
Do you know what each of these is called?
What is the word for picture 1? What is the word for picture 2? What is the word for picture 3? What is the word for picture 4?
Click on any of the pictures above to find out what it is called.

Explore our topic dictionary