impermeable

If you have a waterproof raincoat, you could say that your coat is impermeable to the rain. Something that is impermeable does not allow water or liquid to pass through it.

Made up of the prefix im-, meaning “not,” and the adjective permeable, meaning “allowing to pass through,” impermeable is used in much the same way as impervious or impenetrable. However, more so than these words, impermeable is especially associated with liquids and is often used in a scientific or technical context. Some gadgets, like waterproof watches and underwater cameras, are designed to be impermeable.

DEFINITIONS OF: impermeable

1

adj preventing especially liquids to pass or diffuse through

impermeable stone”
“an impermeable layer of scum”
“a coat impermeable to rain”
Synonyms
tight
of such close construction as to be impermeable
retentive
having the power, capacity, or quality of retaining water
water-repellent, water-resistant
hindering the penetration of water
imperviable, impervious
not admitting of passage or capable of being affected
Antonyms:
permeable
allowing fluids or gases to pass or diffuse through
leaky
permitting the unwanted passage of fluids or gases
porous
able to absorb fluids
semipermeable
(of a membrane) selectively permeable
pervious
admitting of passage or entrance
show more antonyms...
WORD FAMILY
USAGE EXAMPLES