| tongue-tied(adjective, quiet, still, shy, silent) |
| unclear(adjective, still, faint, hushed, soundless) |
| uncommunicative(adjective, close, quiet, soft, low) |
| unexpressed(adjective, close, quiet, soft, low) |
| unheard(adjective, still, faint, unclear, hushed) |
| unsociable(adjective, quiet, still, shy, silent) |
| unspoken(adjective, silent, mum, muffled, voiceless) |
| unuttered(adjective, close, quiet, soft, low) |
| voiceless(adjective, quiet, still, shy, silent) |
| whist(adjective, close, quiet, soft, low) |
| wordless(adjective, close, quiet, restrained, still) |
| zipped(adjective, quiet, still, shy, silent) |
| accost |
| aphasiac(adjective, silent, mum, muffled, voiceless) |
| aphasic(adjective, silent, mum, muffled, voiceless) |
| aphonic(adjective, silent, mum, muffled, voiceless) |
| at ease(expression, silenced, whist, disimpassioned) |
| cagey(quiet, restrained, discreet) |
| call |
| cite |