waterproofness
/ˈwɔtərˌprufnəs/
noun
- The quality or state of being able to keep water out; resistance to water penetration.
- The waterproofness of the tent kept us dry during the heavy rain.
- Manufacturers test the waterproofness of watches by submerging them in water.
- The jacket's waterproofness faded after many washes.
Synonyms