| immovable(adjective, strong, hard, tough, determined) |
| intractable(adjective, strong, tough, firm, cold) |
| matter-of-fact(adjective, hard, sound, reasonable, excite) |
| perverse(adjective, tough, firm, resist, determined) |
| sensible(adjective, hard, sound, reasonable, sharp) |
| set(adjective, determined, resolute, inflexible, obstinate) |
| stiff(adjective, determined, resolute, inflexible, obstinate) |
| tough-minded(adjective, hard, sound, excite, real) |
| unbendable(adjective, determined, resolute, obstinate, uncompromising) |
| balky(tough, firm, unreasonable, grim, inflexible) |
| business-like |
| contrary(adjective, determined, resolute, obstinate, uncompromising) |
| determined(adjective, tough, firm, resolute, obstinate) |
| earthy(hard, sound, rational, straightforward, realistic) |
| hard-boiled(adjective, strong, hard, sound, tough) |
| hidebound(adjective, determined, resolute, inflexible, obstinate) |
| inelastic(adjective, determined, resolute, obstinate, uncompromising) |
| pat(adjective, determined, resolute, obstinate, uncompromising) |
| stern(adjective, determined, serious, resolute, uncompromising) |
| tough(adjective, strong, hard, determined, unreasonable) |