- Definitions|2
- Thesaurus|1.5k
- Abbreviations|0
49 entries under mysterious topic. ×
| obscure(adjective, dark, sophisticated, complicated) | |
| unfathomable(adjective, hard, knowledge, obscure, difficult) | |
| arcane(adjective, obscure, solid, strange, doubtful) | |
| inexplicable(adjective, obscure, solid, dark, strange) | |
| mystic(adjective, obscure, solid, dark, superior) | |
| occult(adjective, obscure, dark, superior, strange) | |
| unaccountable(adjective, obscure, solid, strange, doubtful) | |
| baffling(adjective, obscure, solid, deep) | |
| dark(adjective, feature, obscure, hidden) | |
| cabalistic(adjective, obscure, solid, strange, odd) | |
| difficult(adjective, obscure, dark, strange, odd) | |
| indecipherable(adjective, obscure, deep, incoherent) | |
| invisible(obscure, dark, superior, supernatural) | |
| numinous(obscure, dark, superior, supernatural) | |
| secret(adjective, obscure, dark, superior, strange) | |
| supernatural(adjective, obscure, dark, spiritual) | |
| unknown(obscure, dark, superior, strange) | |
| abnormal(obscure, dark, superior, supernatural) | |
| celestial(obscure, dark, superior, supernatural) | |
| concealed(obscure, dark, superior, strange) |
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| APA | Smart Define. (2015). impenetrable thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/impenetrable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "impenetrable thesaurus" https://smartdefine.org/impenetrable/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2015, impenetrable thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/impenetrable/thesaurus/synonyms>. |
| MLA | Smart Define. "impenetrable thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/impenetrable/thesaurus/synonyms> |