| defiant(adjective, unwilling, defiant, disobedient, disregardful) |
| hidebound(adjective, moderate, severe, determined, resolute) |
| indomitable(adjective, violent, determined, resolution, resolute) |
| difficult(adjective, hard, tough, stubborn, complicated) |
| pat(adjective, determined, usual, regular, serious) |
| pig-headed(adjective, determined, resolute, impulsive, stubborn) |
| staunch(adjective, strong, tough, firm, intense) |
| stony(adjective, tenacious) |
| unflinching(adjective, strong, firm, determined, resolution) |
| ungovernable(adjective, control, order, resist, violent) |
| bull-headed(adjective, determined, resolute, stubborn, uncompromising) |
| constant(adjective, moderate, firm, determined, serious) |
| dour(adjective, severe, difficult, sullen, crabby) |
| inelastic(adjective, determined, resolute, uncompromising, unshakeable) |
| set in stone(expression, adjective, idiom, mean, hard) |
| severe(adjective, severe, rigid) |
| steady(adjective, moderate, determined, resolution, resolute) |
| stern(adjective, hard, tough, severe, rough) |
| strong(adjective, rigid, tenacious) |
| strong-minded(adjective, determined, resolution, fixed, serious) |