| insensible(adjective, impervious, unreceptive, unimpressible, irresponsive) |
| invulnerable(adjective, impervious, unreceptive, unimpressible, irresponsive) |
| matter-of-fact(adjective, impervious, unreceptive, unimpressible, irresponsive) |
| passionless(adjective, impervious, unreceptive, unimpressible, irresponsive) |
| placid(adjective, impervious, unreceptive, unimpressible, irresponsive) |
| poker-faced(adjective, impervious, unreceptive, unimpressible, irresponsive) |
| reserved(adjective, impervious, unreceptive, unimpressible, irresponsive) |
| resistant(adjective, impervious, unreceptive, unimpressible, irresponsive) |
| reticent(adjective, impervious, unreceptive, unimpressible, irresponsive) |
| sedate(adjective, impervious, unreceptive, unimpressible, irresponsive) |
| self-contained(adjective, impervious, unreceptive, unimpressible, irresponsive) |
| serene(adjective, impervious, unreceptive, unimpressible, irresponsive) |
| spiritless(adjective, impervious, unreceptive, unimpressible, irresponsive) |
| stoical(adjective, impervious, unreceptive, unimpressible, irresponsive) |
| stolid(adjective, impervious, unreceptive, unimpressible, irresponsive) |
| taciturn(adjective, impervious, unreceptive, unimpressible, irresponsive) |
| unexcitable(adjective, impervious, unreceptive, unimpressible, irresponsive) |
| unflappable(adjective, impervious, unreceptive, unimpressible, irresponsive) |
| unimpressible(adjective, impervious, unreceptive, irresponsive) |
| unmovable(adjective, impervious, unreceptive, unimpressible, irresponsive) |