Definition

The quality of not allowing liquids or gases to pass through.

Example

The impermeability of the material makes it ideal for waterproof clothing.

Conversation

Have you heard about the new waterproof jacket?

Yeah, I heard it's great for its impermeability against rain.

That's impressive! I need something that can keep me dry.

For sure, especially during these wet seasons.

Synonyms & Antonyms

Root Explanation

Impermeability → It is formed from "im-" (meaning not) and "permeare" (meaning to pass through) and the suffix "-ity" (meaning the state or condition of). The word describes the state of not allowing passage through, particularly in reference to liquids or gases.

Memory Tip

Think of 'not' ('im-') allowing something to 'pass through' ('permeare') — that's why impermeability means the condition of not letting things pass through.

Visually Confused Words