| dull(adjective, quiet, weak, soft, gentle) |
| mumbled(adjective, quiet, soft, unclear) |
| quiescent(adjective, close, quiet, soft) |
| stifled(adjective, dull, quiet, weak, soft) |
| unuttered(adjective, close, quiet, soft) |
| whist(adjective, close, quiet, soft) |
| wordless(adjective, quiet, soft, still) |
| bated(adjective, dull, weak, soft, gentle) |
| buttoned up(expression, adjective, close, quiet, soft) |
| clammed up(expression, adjective, close, quiet, soft) |
| close(adjective, quiet, soft, still) |
| close-mouthed(adjective, close, quiet, soft) |
| closemouthed(adjective, quiet, soft, still) |
| could hear a pin drop(expression, adjective, idiom, close, quiet) |
| distant(adjective, dull, weak, soft, gentle) |
| hushful(adjective, close, quiet, soft) |
| inobtrusive(adjective, quiet, soft) |
| low-pitched(adjective, dull, close, quiet, weak) |
| nonvocal(adjective, quiet, soft, still) |
| not saying boo(expression, adjective, idiom, close, quiet) |