waterproofness

English

Etymology

waterproof +‎ -ness

Noun

waterproofness (uncountable)

The property of being waterproof.
- 1961 February, “Talking of Trains: New L.T. research laboratory”, in Trains Illustrated, page 77:
  In the fabric section, a textile twisting and tearing machine and a "Lissajou curve" [sic] abrader (covering a complete area in overlapping curves) are supplemented by apparatus for evaluating waterproofness, fibre diameter and light-fastness.

References

“waterproofness”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.

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