| delinquent |
| demanding(adjective, persistent, obstinate, insistent, dogged) |
| disobeying(adjective, disobedient) |
| dogged(tough, firm, determined, unreasonable, fixed) |
| drastic(adjective, hard, severe, rough, harsh) |
| ebullient(adjective, wild, vivacious, effervescent, uncontrollable) |
| effervescent(adjective, wild, vivacious, uncontrollable, uncontainable) |
| enthusiastic(adjective, wild, foolish, crazy, irrational) |
| exacting(adjective, persistent, obstinate, insistent, dogged) |
| factious(adjective, disobedient) |
| ferocious(adjective, hard, severe, rough, harsh) |
| fierce(adjective, hard, severe, rough, harsh) |
| fixed(tough, firm, determined, unreasonable, inflexible) |
| gargantuan |
| gawky |
| hang tough(expression, tough, difficult, wild, awkward) |
| hard-shell(adjective, persistent, obstinate, insistent, dogged) |
| hard-shelled(adjective, persistent, obstinate, insistent, dogged) |
| hardheaded(tough, firm, unreasonable, grim, inflexible) |
| hell-bent(adjective, persistent, obstinate, insistent, dogged) |