- Definitions|2
- Thesaurus|240
- Abbreviations|0
8 entries under impenetrable topic. ×
| unclear(nervous, insecure, unsure, unfathomable) | |
| obscure(solid, dense, unfathomable, unintelligible) | |
| incognizable(solid, dense, unfathomable, unintelligible) | |
| sibylline(solid, dense, unfathomable, unintelligible) | |
| unfathomable(solid, dense, unintelligible, impassable) | |
| ungraspable(solid, dense, unfathomable, unintelligible) | |
| unintelligible(solid, dense, unfathomable, impassable) | |
| unknowable(solid, dense, unfathomable, unintelligible) |
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| APA | Smart Define. (2013). delphic thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/delphic/thesaurus/synonyms |
| Chicago | Smart Define. 2013. "delphic thesaurus" https://smartdefine.org/delphic/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2013, delphic thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/delphic/thesaurus/synonyms>. |
| MLA | Smart Define. "delphic thesaurus" 28 June 2013. Web. 27 September 2026. <https://smartdefine.org/delphic/thesaurus/synonyms> |