invulnerable

incapable of being defeated, overcome, or subdued <typically teenagers suppose themselves to be invulnerable, so they take needless risks> Synonyms bulletproof, impregnable, indomitable, insuperable, insurmountable, invincible, unbeatable, unconquerable, unstoppableRelated Words inviolable, unassailable, unbreachable, untouchable; armored, defended, guarded, protected, safe, safeguarded, secure, shielded; unbeaten, unbowed, unconquered, undefeated, unsubduedNear Antonyms exposed, imperiled (or imperilled), insecure, liable, open, susceptible, unguarded, unprotected, unsafe; defenseless, helpless, powerless, weakAntonyms superable, surmountable, vincible, vulnerable