| determined(adjective, resolute, obstinate, uncompromising, unshakeable) |
| inelastic(adjective, hard, firm, solid, determined) |
| inexorable(adjective, determined, resolute, obstinate, uncompromising) |
| insistent(adjective, determined, resolute, obstinate, uncompromising) |
| loath(adjective, slow, awkward, shy, forced) |
| nonabsorbent |
| pat(adjective, determined, resolute, obstinate, uncompromising) |
| protected(adjective, safe, unaffected, resilient, impervious) |
| relentless(adjective, determined, resolute, obstinate, uncompromising) |
| set in stone(adjective, determined, resolute, obstinate, uncompromising) |
| standing pat(adjective, determined, resolute, obstinate, uncompromising) |
| sturdy(adjective, strong, tough, fit, healthy) |
| unaffected(adjective, hard, unfeeling, unsympathetic, safe) |
| unconquerable(adjective, insurmountable) |
| uncooperative(adjective, difficult, awkward, forced, averse) |
| ungovernable |
| unmanageable |
| unrelenting(adjective, determined, resolute, obstinate, uncompromising) |
| unruly |
| unshakable(adjective, determined, resolute, obstinate, uncompromising) |