| removed(adjective, indifferent, detached, casual, aloof) |
| resigned(adjective, quiet, flat, indifferent, apathetic) |
| reticent(adjective, cool, detached, blank, aloof) |
| self-composed(adjective, unexcitable) |
| self-contained(adjective, cool, blank, aloof, unemotional) |
| self-controlled(adjective, unexcitable) |
| silent |
| sleepy(adjective, quiet, flat, indifferent, apathetic) |
| sobersided |
| somber |
| spaced-out(adjective, indifferent, casual, aloof, remote) |
| spacey(adjective, indifferent, casual, aloof, remote) |
| spiritless(adjective, cool, blank, aloof, unemotional) |
| static(adjective, quiet, flat, indifferent, apathetic) |
| steady(adjective, unexcitable) |
| straight-faced(adjective, dull, dead, impassive, unresponsive) |
| strictly business(expression, adjective, cool, cold, indifferent) |
| stupid(adjective, dull, dead, impassive, unresponsive) |
| submissive(adjective, quiet, flat, indifferent, apathetic) |
| taciturn(adjective, cool, blank, aloof, unemotional) |