| unresponsive |
| unsecurable |
| unsusceptible |
| hermetic(adjective, unaffected, unyielding, unbending, resistant) |
| immune(unaffected, unyielding, unbending, resistant, unreceptive) |
| impassable(unaffected, unyielding, unbending, resistant, unreceptive) |
| impassive(unaffected, unyielding, unbending, resistant, unreceptive) |
| impermeable(unaffected, unyielding, unbending, resistant, unreceptive) |
| imperviable(unaffected, unyielding, unbending, resistant, unreceptive) |
| invulnerable(unaffected, unyielding, unbending, resistant, unreceptive) |
| obdurate(unyielding, unbending, unreceptive) |
| resistant(unaffected, unyielding, unbending, unreceptive) |
| rigid(unyielding, unbending, unreceptive) |
| sealed(unaffected, unyielding, unbending, resistant, unreceptive) |
| tight(unaffected, unyielding, unbending, resistant, unreceptive) |
| unaffected(unyielding, unbending, resistant, unreceptive) |
| unbending(unyielding, unreceptive) |
| unfeeling(unyielding, unbending, unreceptive) |
| unmoved(unaffected, unyielding, unbending, resistant, unreceptive) |
| unpierceable(unaffected, unyielding, unbending, resistant, unreceptive) |