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waterproof.

Resistant to the effects of water.

10 characters3 syllables approx.English language

Meaning & usage

adj/ˈwɔːtəˌpruːf/Received-Pronunciation/ˈwɔt̬ɚˌpruf/General-American/ˈwɑ(ː)t̬ɚ-/General-American
  1. Resistant to the effects of water.

    broadly
  2. Made of or covered with material that doesn't allow water in; impervious to water and immune to its effects.

  3. Incapable of failing; unassailable.

    figuratively
  4. Not dependent on an aquatic environment to live; thus, able to live on dry land, or at least in a semiaquatic environment.

    uncommon
Where this word comes from

From water + -proof. Compare West Frisian wetterproef (“waterproof”), Dutch waterproef (“waterproof”).

verb/ˈwɔːtəˌpruːf/Received-Pronunciation/ˈwɔt̬ɚˌpruf/General-American/ˈwɑ(ː)t̬ɚ-/General-American
  1. To make waterproof or water-resistant.

Where this word comes from

From water + -proof. Compare West Frisian wetterproef (“waterproof”), Dutch waterproef (“waterproof”).

noun/ˈwɔːtəˌpruːf/Received-Pronunciation/ˈwɔt̬ɚˌpruf/General-American/ˈwɑ(ː)t̬ɚ-/General-American
  1. A substance or preparation for rendering cloth, leather, etc., impervious to water.

    countable · uncountable
  2. Cloth made waterproof, or any article made of such cloth, or of other waterproof material, as rubber; especially, an outer garment made of such material.

    countable · uncountable
Where this word comes from

From water + -proof. Compare West Frisian wetterproef (“waterproof”), Dutch waterproef (“waterproof”).

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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.

Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.