adjective
1.
Synonyms: invincible 1, impregnable, inconquerable, inexpugnable, invulnerable, unassailable, unbeatable, unconquerable, undefeatable
Antonyms: domitable
2.
Synonyms: insuperable , impassable, inconquerable, insurmountable, invincible, unconquerable, unsurmountable
Related Word: dogged, pertinacious, stubborn; resolute, staunch, steadfast
Antonyms: domitable
3.
Synonyms: unruly 1, fractious, indocile, intractable, recalcitrant, undisciplinable, undisciplined, ungovernable, unmanageable, wild