| pig-headed(adjective, obstinate, characteristic, quality, refusal) |
| persevering(adjective, characteristic, quality, strong, tough) |
| bullheaded(adjective, characteristic, quality, strong, hard) |
| set in stone(expression, adjective, idiom, mean, hard) |
| willful(adjective, characteristic, quality, strong, tough) |
| difficult(adjective, hard, complex, change, position) |
| adamantine(adjective, characteristic, quality, strong, hard) |
| iron(adjective, characteristic, quality, mean, strong) |
| unaccommodating(adjective, change, position, attitude, determination) |
| unregenerate(adjective, characteristic, quality, refusal, stubbornness) |
| standing pat(adjective, determined, resolute, obstinate, uncompromising) |
| uncompliant(adjective, characteristic, quality, tough, resist) |
| unruly(adjective, difficult, violent, wild, determined) |
| unshakeable(adjective, determined, resolute, uncompromising) |
| balky(adjective, characteristic, quality, attitude, informal) |
| insubordinate(adjective, characteristic, quality, tough, firm) |
| wayward(adjective, tough, difficult, negative, hostile) |
| incompliant(adjective, characteristic, quality, tough, resist) |
| unchangeable(adjective, steady, fixed, resolute, rigid) |
| pat(adjective, characteristic, quality, determined, usual) |