Englishunassailable
adjective
1 the world's most unassailable fortress:
impregnable, invulnerable, impenetrable, inviolable, invincible, unconquerable, unattackable;
secure, safe, safe and sound, well defended, well fortified, fortress-like;
strong, stout, indestructible.
▷antonyms assailable; defenseless.
2 his logic was unassailable:
indisputable, undeniable, unquestionable, incontestable, incontrovertible, irrefutable, indubitable, watertight, sound, conclusive, absolute, positive, proven, beyond dispute, beyond question, beyond doubt, beyond a shadow of a doubt, certain, sure, manifest, patent, obvious.
| word toolkit | unassailable |
| See indomitable. | |