309 entries under adjective topic. ×
| impenetrable | |
| labyrinthian | |
| meandering(hard, difficult, tricky, complicated) | |
| mysterious(hard, obscure, delicate, tricky) | |
| strenuous | |
| unfathomable(hard, obscure, difficult, tricky) | |
| winding | |
| can of worms(expression, idiom, hard, fancy) | |
| Daedalean(hard, fancy, difficult, involved) | |
| abstract(hard, obscure, delicate, intellectual) | |
| arcane | |
| confounded | |
| cross-cultural(union, unity, amalgamation, joining) | |
| extravagant(fancy, exact, involved, busy) | |
| fussy(fancy, difficult, exact, involved) | |
| harsh(hard, severe, rough, difficult) | |
| hidden(verb, hard, obscure, difficult) | |
| incomprehensible(obscure, heavy, deep, puzzling) | |
| inscrutable | |
| jumbled(difficult, involved, dense, complicated) |
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| APA | Smart Define. (2016). complex thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/complex/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "complex thesaurus" https://smartdefine.org/complex/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, complex thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/complex/thesaurus/synonyms>. |
| MLA | Smart Define. "complex thesaurus" 11 January 2016. Web. 20 September 2026. <https://smartdefine.org/complex/thesaurus/synonyms> |