| resolved(adjective, strong, determined, resolute, rigid) |
| solid(adjective, set, strong, hard, sound) |
| stiff-necked(adjective, mean, strong, hard, tough) |
| uncompliant(adjective, resist, determined, resolute, obstinate) |
| contrary(adjective, determined, resolute, obstinate, stubborn) |
| ruthless(adjective, appearance, mean, strong, hard) |
| unswerving(adjective, strong, tough, firm, determined) |
| incompliant(adjective, tough, firm, resist, determined) |
| pat(adjective, tough, determined, resolute, obstinate) |
| recalcitrant(adjective, tough, firm, determined, fixed) |
| strict(adjective, strong, hard, tough, easy) |
| strong-willed(adjective, determined, resolute, uncompromising, unshakeable) |
| hardheaded(adjective, strong, hard, tough, determined) |
| hidebound(adjective, firm, determined, stiff, resolute) |
| indomitable(adjective, set, strong, hard, tough) |
| rigorous(adjective, strong, hard, tough, harsh) |
| stony(adjective, mean, hard, firm, harsh) |
| willful(adjective, strong, tough, firm, violent) |
| business-minded |
| cruel(adjective, appearance, mean, strong, hard) |