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waterproof

waterproof

35 1.6
Not letting water pass through
  • adjective
  • /ˈwɔːtərpruːf/
translation icon : impermeable
  • The new backpack is designed to be waterproof, ensuring that my belongings stay safe in bad weather.
  • waterproof boots
  • waterproof material
  • waterproof search coil

So you need to use a waterproof pencil.

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Examples

  • It's completely waterproof and actually plastic.

  • The limited amount of camera gear we carried was placed in waterproof bags.

    Academic text (2000)
  • Feet are a major concern. "Pack boots" are warm, waterproof footwear essential for winter work.

    Academic text (1994)
  • "My father was so worried about rain that he ordered twenty waterproof canopies from San Francisco.

    Fiction book (1993)
  • The unit has a small, waterproof keyboard and a 7-inch LCD monitor.

    Academic text (2009)
  • This jacket is waterproof, so I can wear it in the rain without getting wet.

  • When hiking in wet conditions, it's important to have waterproof gear to stay dry.

Synonyms

impervious
vswaterproof
28 7.5

Not letting water pass through and not changed by words

means specifically to stop water rather than imply general unaffectedness
watertight
vswaterproof
7 2.6

Completely closed so water cannot get in or out

is the general notion of preventing any water passage
impermeable
vswaterproof
4 6.6

Not allowing water or air to pass through

is focused specifically on preventing water passage rather than all fluids
water-repellent
vswaterproof
1 3.6

Does not let water soak in easily

denotes complete prevention of water passage rather than mere resistance
rainproof
vswaterproof
1 2.7

Keeping rain out so things stay dry

means preventing all water passage, not just rain
waterproofed
vswaterproof
3.3

Treated so clothes or shoes do not let water in

describes the basic property of stopping water without treatment detail
weathertight
vswaterproof
3.7

Not allowing water or wind to enter a building

is narrower, referring only to stopping water passage

Antonyms

26 1.5

Allowing liquid or gas to escape through holes and cracks

4 5.8

A material that lets water or air pass through it

Compounds

A coat that keeps you dry in the rain

A container that keeps things dry in water

How Waterproof

watertight
7 2.6
waterproof
35 1.6
permeable
4 5.8

Surface Forms

waterproof positive

Morphology

waterproof = water + proof (transparent) = water + proof

A clear compound of 'water' + 'proof' with the straightforward meaning 'resistant to water'.

Etymology

Waterproof comes from the parts water and proof, where proof is used to mean 'resistant to', as in fireproof or bulletproof, so waterproof literally means 'keeps water out' and describes something water cannot pass through.