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GRE vocabulary

impermeable

adjectiveHigh-frequency wordMore I words

not allowing fluids or gases to pass through; impossible to penetrate

Word origin: From Latin in-, not, plus permeare, to pass through.

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In a sentence

Impermeable in a sentence

Here are example sentences showing impermeable in a sentence.

The dam was constructed of impermeable concrete to prevent any seepage.

The vault was lined with a clay barrier impermeable to groundwater.

Synonyms
impenetrablewatertightresistant
Antonyms
permeableporouspenetrable
Usage & nuance

Using “impermeable” well

Impermeable means not allowing liquids or gases to pass through. It is largely a literal, physical term, in contrast with impervious, which readily extends to figurative imperviousness.

Common questions

Questions about “impermeable

Impermeable (adjective) means not allowing fluids or gases to pass through; impossible to penetrate
Here is impermeable used in an example sentence: "The dam was constructed of impermeable concrete to prevent any seepage." Another example: "The vault was lined with a clay barrier impermeable to groundwater."
Common synonyms for impermeable include impenetrable, watertight, resistant.
Antonyms of impermeable include permeable, porous, penetrable.
Clusters with impenetrable, watertight, and resistant, opposed by permeable, porous, and penetrable. The GRE pairs it with permeable as a direct opposite, both built on the root for passing through.
Yes. Impermeable is a high-frequency GRE word, so it is worth prioritising as you build your vocabulary.

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