| tight(adjective, hard, firm, solid, stiff) |
| uncooperative(adjective, tough, difficult, wild, awkward) |
| undisciplined(tough, difficult, wild, awkward, obstinate) |
| undutiful |
| unflexible(adjective, hard, tough, firm, solid) |
| ungraceful(adjective, hard, firm, solid, tense) |
| unpliable(tough, difficult, wild, awkward, obstinate) |
| unreasonable(adjective, stubborn) |
| unshakeable(adjective, determined, resolute, uncompromising) |
| unsubmissive |
| unsupple(adjective, hard, firm, solid, tense) |
| unswayable(adjective, tough, firm, fixed, distant) |
| unswerving(adjective, determined, resolute, uncompromising, unshakeable) |
| unwavering(adjective, determined, resolute, uncompromising, unshakeable) |
| uptight(adjective, tough, firm, fixed, distant) |
| wilful |
| wooden(adjective, hard, firm, solid, tense) |
| badly behaved |
| bull-headed(obstinate, stubborn, willful) |
| cussed(adjective, stubborn) |