| at a standstill(expression, adjective, idiom, tranquil, silent) |
| at ease(expression, silenced, whist, disimpassioned) |
| backstage(unknowing, hermetical, unbriefed) |
| be calm(quiet, inactivate) |
| be silent |
| behind the curtain(expression, idiom, unknowing, hermetical, unbriefed) |
| behind the scenes(expression, idiom, unknowing, hermetical, unbriefed) |
| birdbrained(unknowing, hermetical, unbriefed) |
| blind to(expression, unknowing, hermetical, unbriefed) |
| can it(expression, quiet, inactivate) |
| caught napping(expression, unknowing, hermetical, unbriefed) |
| choke off(expression, quieten, shush, dulling) |
| close up(expression, quieten, shush, dulling) |
| composed(silenced, whist, disimpassioned) |
| confidentiality(adjective, hushed, wordless) |
| cool(astonished, thunderstruck, flabbergasted) |
| cool as cucumber(expression, idiom, silent, dazed, dumb) |
| cool it(expression, quiet, quieten, inactivate, shush) |
| cool out(expression, quiet, inactivate) |
| cretinous(unknowing, hermetical, unbriefed) |