| cloaked(secret, hidden, underground, concealed, sneaky) |
| close up(verb, expression, calm, dull, quiet) |
| cool it(expression, calm, dull, quiet, suppress) |
| cryptic(clandestine, underground, undisclosed) |
| cut off(verb, expression, calm, dull, quiet) |
| dampen(verb, calm, dull, quiet, suppress) |
| deaden(verb, calm, dull, quiet, suppress) |
| decrease the volume(expression, idiom, calm, dull, quiet) |
| disguised(secret, hidden, clandestine, concealed, sneaky) |
| dry up(verb, expression, calm, dull, quiet) |
| dull(verb, calm, quiet, suppress, subdue) |
| dumb(verb, calm, dull, quiet, suppress) |
| enigmatic(sneak, skulking) |
| esoteric(clandestine, underground, undisclosed) |
| extinguish(verb, calm, dull, quiet, suppress) |
| gag(verb, calm, dull, quiet, suppress) |
| intimate(adjective, special, private, personal, confidential) |
| keep it down(expression, idiom, calm, dull, quiet) |
| lull(calm, dull, quiet, suppress, subdue) |
| masked(secret, hidden, concealed, underhanded, covered) |