- Definitions|2
- Thesaurus|295
- Abbreviations|0
11 entries under expression topic. ×
| closed book(question, secret, puzzle, subtlety) | |
| sixty-four-thousand-dollar question(question, secret, puzzle, subtlety) | |
| tough nut to crack(idiom, difficulty, question, secret) | |
| confidential information(perplexity, inscrutableness) | |
| double meaning(uncertainty, vagueness, haziness) | |
| intellectual depth | |
| keen insight | |
| magic number(perplexity, inscrutableness) | |
| penetrating knowledge | |
| privileged information(perplexity, inscrutableness) | |
| skeleton in cupboard(idiom, perplexity, inscrutableness) |
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| APA | Smart Define. (2015). abstruseness thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/abstruseness/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "abstruseness thesaurus" https://smartdefine.org/abstruseness/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, abstruseness thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/abstruseness/thesaurus/synonyms>. |
| MLA | Smart Define. "abstruseness thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/abstruseness/thesaurus/synonyms> |