- Definitions|2
- Thesaurus|1.5k
- Abbreviations|0
91 entries under dark topic. ×
| obscure(adjective, sophisticated, mysterious, complicated) | |
| unfathomable(adjective, hard, knowledge, obscure, difficult) | |
| incomprehensible(adjective, knowledge, obscure, solid) | |
| unintelligible(adjective, knowledge, obscure, solid) | |
| inexplicable(adjective, obscure, solid, strange) | |
| mystic(adjective, obscure, solid, superior) | |
| occult(adjective, obscure, superior, strange) | |
| murky(adjective, obscure, solid, gloomy) | |
| unknowable(adjective, obscure, solid, superior) | |
| cloudy(adjective, gloomy, dense, misty) | |
| hidden(adjective, obscure, difficult, solid) | |
| difficult(adjective, obscure, strange, odd) | |
| dim(adjective, gloomy, dense, cloudy) | |
| uncomprehensible(adjective, knowledge, obscure, superior) | |
| dull(adjective, gloomy, dense, cloudy) | |
| invisible(obscure, superior, mysterious, supernatural) | |
| lowering(gloomy, dirty, dreary, misty) | |
| misty(gloomy, dense, cloudy, impervious) | |
| numinous(obscure, superior, mysterious, supernatural) | |
| secret(adjective, obscure, superior, strange) |
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| APA | Smart Define. (2015). impenetrable thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/impenetrable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "impenetrable thesaurus" https://smartdefine.org/impenetrable/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, impenetrable thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/impenetrable/thesaurus/synonyms>. |
| MLA | Smart Define. "impenetrable thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/impenetrable/thesaurus/synonyms> |