noun, noun which may take the genitive case particle 'no'
waterproofness; water resistance
Refers to the property of being waterproof or water-resistant, often used in product descriptions.
This watch has excellent waterproofness.
We use highly waterproof materials.
breathable-waterproof material; waterproof-breathable fabric
Compound of 防水 (waterproof) + 性 (property, quality).