| brass-bound(adjective, determined, resolute, obstinate, uncompromising) |
| dogmatic(adjective, determined, fixed, rigid, strict) |
| grim(adjective, strong, hard, tough, firm) |
| hardened(adjective, determined, fixed, resolute, stubborn) |
| hidebound(adjective, determined, resolute, obstinate, uncompromising) |
| resolved(adjective, deliberate, determined, fixed, stubborn) |
| set in stone(expression, adjective, idiom, mean, hard) |
| single-minded(adjective, tough, firm, determined, resolute) |
| stiff(adjective, determined, resolute, obstinate, uncompromising) |
| uncooperative(adjective, mean, hard, tough, difficult) |
| cussed(adjective, tough, firm, unreasonable, grim) |
| deerlike |
| froward(adjective, deliberate, determined, impulsive, stubborn) |
| incompliant(adjective, tough, firm, difficult, awkward) |
| inconvincible(adjective, determined, resolute, uncompromising, unshakeable) |
| insistent(adjective, determined, resolute, obstinate, uncompromising) |
| ossified(adjective, determined, resolute, uncompromising, unshakeable) |
| rebellious(adjective, tough, firm, unreasonable, grim) |
| restive(determined, fixed, stubborn, capricious, willful) |
| self-opinionated(adjective, determined, resolute, uncompromising, unshakeable) |