| pitiless(adjective, hard, tough, severe, cold) |
| practical(rational, straightforward, down-to-earth) |
| pragmatic(adjective, tough, rational, straightforward, unfeeling) |
| prim |
| rigid |
| rocky |
| sedate(adjective, quiet, cool, moderate, gentle) |
| serious(adjective, rational, straightforward, down-to-earth) |
| silent(adjective, indifferent, detached, distant, apathetic) |
| slow(adjective, dull, quiet, cool, still) |
| stiff(adjective, hard, detached, unfeeling, unsympathetic) |
| temperate(adjective, calm, quiet, cool, moderate) |
| torpid(adjective, hard, unfeeling, unsympathetic, hardened) |
| unapproachable(restrained, detached, hostile, unfriendly, phlegmatic) |
| unbiased(adjective, calm, indifferent, detached, aloof) |
| uncommunicative(adjective, indifferent, restrained, detached, distant) |
| unimpressed(adjective, quiet, cool, moderate, gentle) |
| uninspired(adjective, indifferent, unenthusiastic, unconvinced) |
| uninvolved(adjective, calm, dull, flat, indifferent) |
| unloving(adjective, hard, cruel, detached, unfeeling) |