| soft-spoken(adjective, quiet, gentle, aloof, peaceful) |
| sole(adjective, separate, private, alone, singular) |
| solo(adjective, separate, private, alone, singular) |
| stag(adjective, separate, distant, remote, reserved) |
| stiff(adjective, cold, modest, unfriendly, aloof) |
| stuck-up(adjective, cold, modest, unfriendly, aloof) |
| sullen |
| taciturn(adjective, close, quiet, gentle, mild) |
| unaccompanied(adjective, separate, private, alone, singular) |
| unclubbable |
| unconcerned(adjective, quiet, cold, detached, thoughtful) |
| uncongenial |
| uncurious(adjective, quiet, restrained, detached, thoughtful) |
| undemonstrative(adjective, close, quiet, gentle, mild) |
| unforthcoming(adjective, quiet, cold, restrained, detached) |
| unfrequented(adjective, separate, distant, remote, reserved) |
| unresponsive(adjective, close, quiet, gentle, mild) |
| QT(isolated, reclusive) |
| alone(adjective, private, singular, lonely, unsociable) |
| aseptic(adjective, quiet, restrained, detached, thoughtful) |