| unrelenting(adjective, determined, resolute, rigid, obstinate) |
| adamant(adjective, hard, determined, resolute, obstinate) |
| firm(adjective, determined, resolute, rigid, obstinate) |
| obstinate(adjective, tough, firm, determined, resolute) |
| unshakable(adjective, determined, resolute, obstinate, uncompromising) |
| hanging tough(adjective, determined, resolute, uncompromising, unshakeable) |
| steadfast(adjective, determined, resolute, strict, obstinate) |
| inelastic(adjective, tough, firm, determined, distant) |
| pat(adjective, determined, resolute, obstinate, uncompromising) |
| resistant(adjective, determined, resolute, obstinate, uncompromising) |
| unwavering(adjective, determined, resolute, obstinate, uncompromising) |
| hidebound(adjective, determined, resolute, obstinate, uncompromising) |
| mulish(adjective, determined, resolute, obstinate, uncompromising) |
| pertinacious(adjective, determined, resolute, obstinate, uncompromising) |
| uncompliant(adjective, set, hard, stiff, resolute) |
| adamantine(adjective, hard, resolute, rigid, inflexible) |
| bigoted(adjective, determined, resolute, obstinate, uncompromising) |
| bovine(adjective, determined, resolute, obstinate, uncompromising) |
| brass-bound(adjective, determined, resolute, obstinate, uncompromising) |
| bull-headed(adjective, determined, resolute, obstinate, uncompromising) |