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hardened to

ADJECTIVE

immune

Synonyms

STRONGEST

exempt resistant unaffected

STRONG

clear free safe

WEAK

allowed favored insusceptible irresponsible licensed not affected not liable not subject privileged protected unanswerable unliable unsusceptible

Antonyms

STRONG

hindered

WEAK

susceptible unguarded unprotected vulnerable

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