| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | steadfast, unyielding |
| Synonyms: | dogged, impassable, impregnable, insuperable, insurmountable, invincible, invulnerable, obstinate, pertinacious, resolute, ruthless, staunch, stubborn, unassailable, unbeatable, unconquerable, undefeatable, unflinching, willful |
| Antonyms: | beatable, conquerable, unstable, weak, yielding |