MeanOF

impervious

- adjective (adj)

Meaning: unable to be penetrated

Synonyms: closed to hermetic immune impassable impassive impenetrable impermeable imperviable inaccessible invulnerable resistant sealed tight unaffected unapproachable unmoved unpierceable unreceptive watertight

Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.