Synonyms and Antonyms of impregnable
1 incapable of being defeated, overcome, or subdued an impregnable fortress that had foiled one invader after another over the centuries Synonyms of impregnable bulletproof, invincible, indomitable, insuperable, insurmountable, invulnerable, unbeatable, unconquerable, unstoppableWords Related to impregnable inviolable, unassailable, unbreachable, untouchable; armored, defended, guarded, protected, safe, safeguarded, secure, shielded; unbeaten, unbowed, unconquered, undefeated, unsubduedNear Antonyms of impregnable exposed, imperiled (or imperilled), insecure, liable, open, susceptible, unguarded, unprotected, unsafe; defenseless, helpless, powerless, weakAntonyms of impregnable superable, surmountable, vincible, vulnerable
2 impossible to get through or into the castle's supposedly impregnable walls Synonyms of impregnable impassable (also impassible), impermeable, impervious, impenetrableWords Related to impregnable close, compact, dense, thick, tight; compressed, condensed; sturdy, substantial, tough; firm, frozen, hard, solid, stiff; inflexible, rigid, unbending, unyieldingNear Antonyms of impregnable soft, squishy; bendable, elastic, flexible, giving, malleable, pliable, yielding; absorbent, porousAntonyms of impregnable negotiable, passable, penetrable, permeable
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