| antagonistic |
| antipathetic(negative, hostile, different, adverse, conflicting) |
| confirmed(adjective, hard, severe, rough, harsh) |
| conflicting(adjective, negative, hostile, different, adverse) |
| cross(irritable, restless, obstinate, stubborn, willful) |
| demanding(adjective, tough, persistent, obstinate, problematic) |
| fixed(adjective, hard, tough, rough, firm) |
| forced(adjective, difficult, awkward, averse, disinclined) |
| hard-shell(adjective, determined, persistent, impulsive, obstinate) |
| hearty |
| inimical(unpleasant, negative, hostile, different, adverse) |
| iron(adjective, persistent, obstinate, insistent, dogged) |
| petulant(adjective, cross, irritable, restless, obstinate) |
| problem(adjective, tough, problematic, trying) |
| relentless(tough, firm, persistent, obstinate, stubborn) |
| resistive |
| set(adjective, hard, tough, firm, solid) |
| single-minded(adjective, tough, firm, persistent, obstinate) |
| stony(adjective, hard, firm, solid, stiff) |
| strong-willed |