| nasty(adjective, mean, hard, severe, sharp) |
| noxious(adjective, mean, nasty, hateful, unkind) |
| persistent(adjective, tough, firm, obstinate, stubborn) |
| pigheaded(adjective, tough, firm, unreasonable, grim) |
| recalcitrant(tough, firm, persistent, obstinate, stubborn) |
| refractory(tough, firm, persistent, obstinate, stubborn) |
| sarcastic(adjective, mean, sharp, nasty, speech) |
| single-minded(tough, firm, persistent, obstinate, stubborn) |
| snappish(irritable, crabby, cantankerous) |
| splenetic(mean, cross, irritable, ugly, obstinate) |
| steadfast(tough, firm, persistent, obstinate, stubborn) |
| stern(adjective, severe, sharp, persistent, bleak) |
| sworn |
| tenacious(tough, firm, persistent, obstinate, stubborn) |
| testy(mean, irritable, crabby, cranky) |
| ugly(mean, cross, rude, coarse, irritable) |
| uncooperative(adjective, persistent, obstinate, insistent, dogged) |
| unmanageable(tough, firm, persistent, obstinate, stubborn) |
| vicious(adjective, mean, nasty, violent, terrible) |
| waspish(mean, cross, irritable, ugly, malicious) |