- Definitions|2
- Thesaurus|1.9k
- Abbreviations|0
| mum(quiet, soft) | |
| mumbled(quiet, soft) | |
| mute(quiet, soft) | |
| noiseless(adjective, quiet, soft, gentle) | |
| nonvocal(quiet, soft) | |
| not talkative(expression, quiet, soft) | |
| out of earshot(expression, idiom, quiet, weak, soft) | |
| reedy(adjective, dull, soft, dim) | |
| silent(quiet, soft) | |
| soundless(quiet, soft) | |
| still(quiet, soft) | |
| unaccented(adjective, dull, soft, dim) | |
| uncommunicative(quiet, soft) | |
| unstressed(adjective, dull, soft, dim) | |
| voiceless(quiet, soft) | |
| wordless(quiet, soft) |
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| APA | Smart Define. (2015). imperceptible thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/imperceptible/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "imperceptible thesaurus" https://smartdefine.org/imperceptible/thesaurus/synonyms (accessed September 29, 2026). |
| Harvard | Smart Define 2015, imperceptible thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/imperceptible/thesaurus/synonyms>. |
| MLA | Smart Define. "imperceptible thesaurus" 13 April 2015. Web. 29 September 2026. <https://smartdefine.org/imperceptible/thesaurus/synonyms> |