| uncooperative(tough, difficult, wild, awkward, obstinate) |
| undergo(verb, hold, go, accept, endure) |
| undeviating(strong, certain, definite, resolved, unalterable) |
| undisciplined(tough, difficult, wild, awkward, obstinate) |
| unflinching(strong, certain, definite, resolved, unalterable) |
| ungovernable(tough, difficult, wild, awkward, obstinate) |
| unmanageable(tough, difficult, wild, awkward, obstinate) |
| unpliable(tough, difficult, wild, awkward, obstinate) |
| unruly(tough, difficult, wild, awkward, obstinate) |
| unyielding(strong, tough, sharp, difficult, definite) |
| venture(disregard, ignore, challenge, resist, frustrate) |
| wayward(tough, difficult, wild, awkward, obstinate) |
| willful(tough, sharp, difficult, awkward, practical) |
| win out(verb, expression, take, bear, endure) |
| work well under pressure |
| submit to(verb, expression, hold, take, go) |
| abiding(strong, certain, definite, resolved, unalterable) |
| agree |
| be patient with(verb, endure) |
| be resolute(verb, maintain, endure, pursue, proceed) |