airproof

[ air-proof ]

adjective

1. impervious to air.

verb (used with object)

1. to make impervious to air.

Word History and Origins

Origin of airproof¹

air ¹ + -proof

Example Sentences

These watches must be waterproof, airproof, resistant to both extreme heat and extreme cold, and capable of withstanding the bumpiest of landings.

From Popular-Science