| self-willed(adjective, tough, firm, determined, unreasonable) |
| inflexible(adjective, tough, firm, determined, obstinate) |
| obdurate(adjective, tough, firm, determined, unreasonable) |
| unyielding(adjective, tough, firm, determined, fixed) |
| fractious(adjective, deliberate, determined, contrary, obstinate) |
| uncontrollable |
| willful(adjective, tough, firm, deliberate, determined) |
| restive(adjective, determined, negative, hostile, fixed) |
| indomitable(adjective, determined, fixed, persistent, obstinate) |
| persistent(adjective, tough, firm, determined, obstinate) |
| determined(adjective, tough, firm, persistent, obstinate) |
| dogged(adjective, tough, firm, determined, unreasonable) |
| firm(adjective, tough, persistent, obstinate, stubborn) |
| incorrigible(adjective, passionate, violent, enthusiastic, fervent) |
| obstreperous |
| uncooperative(adjective, persistent, obstinate, insistent, dogged) |
| wilful |
| mulish(adjective, tough, firm, determined, unreasonable) |
| pertinacious(adjective, tough, firm, determined, unreasonable) |
| pigheaded(adjective, tough, firm, determined, unreasonable) |