Definitions

impervious

[im-pur-vee-uhs] / ɪmˈpɜr vi əs /

ADJECTIVE

unable to be penetrated

Synonyms

STRONGEST

immune impassable impenetrable inaccessible invulnerable resistant unaffected unmoved

STRONG

imperviable

WEAK

closed to hermetic impassive impermeable sealed tight unapproachable unpierceable unreceptive watertight

Antonyms

STRONGEST

affected moved susceptible

WEAK

exposed open penetrable responsive sensitive vulnerable

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The cable makes the drone impervious to electronic jamming.

From The Wall Street Journal • May 1, 2026

Recent raids may try to instill fear, but this special communal space feels impervious to such weak displays.

From Los Angeles Times • Mar. 13, 2026

Oil giants now have a bigger share of crude production in their hands and are largely impervious to price swings, ensuring a steady output.

From The Wall Street Journal • Feb. 17, 2026

I confess I’m not impervious to the posthumous allure.

From Los Angeles Times • Feb. 14, 2026

She is very good at it, and impervious to danger.

From "The Poisonwood Bible" by Barbara Kingsolver

Vocabulary lists containing impervious

Tier 2 Words for the SBAC ELA Items

Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!

Lord of the Flies

Interested in learning more words like this one? Our team at Vocabulary.com has got you covered! You can review flashcards, quiz yourself, practice spelling, and more – and it's all completely free to use!

Essential Academic Vocabulary for High School Students, List 4

Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!