Impervious

/ɪmˈpɜːrviəs/

Meaning & Definition

adjective
Not able to be affected by something.
The new coating on the roof is impervious to rain.
Not allowing fluid to pass through; waterproof.
The impervious membrane kept the water from seeping inside.
Impenetrable; unable to be passed or entered.
His fierce demeanor made him impervious to criticism.
Incapable of being influenced or affected.
She appeared impervious to the stress of her job.

Etymology

Latin 'impervius', from 'in-' meaning 'not' and 'pervius' meaning 'passable'.

Common Phrases and Expressions

impervious to criticism:
Unwilling or unable to be swayed by negative feedback.
impervious surface:
A surface that does not allow water to penetrate.
impervious barrier:
A barrier that prevents any passage or entry.

Related Words

Slang Meanings

Tough as nails.
That guy is tough as nails; he's completely impervious to pain.
Rock solid.
Her confidence is rock solid; she's impervious to doubt.