- Definitions|2
- Thesaurus|2.1k
- Abbreviations|0
67 entries under complex topic. ×
| knotty(adjective, hard, severe, rough, difficult) | |
| tricky(adjective, hard, difficult, awkward) | |
| dire(adjective, hard, difficult, painful) | |
| thorny(adjective, hard, difficult, demanding) | |
| serious(adjective, hard, tough, easy, difficult) | |
| sheer(adjective, hard, sharp, difficult) | |
| grinding(adjective, hard, difficult, harsh, cruel) | |
| unbearable(adjective, hard, difficult, painful) | |
| ambitious(adjective, hard, ability, difficult) | |
| weighty(adjective, hard, difficult, heavy) | |
| cruel(adjective, hard, difficult, painful) | |
| hefty(adjective, dull, hard, difficult, harsh) | |
| intricate(adjective, hard, difficult, awkward) | |
| sensitive(adjective, hard, difficult, painful) | |
| Gordian(adjective, hard, difficult, intricate) | |
| byzantine(adjective, hard, difficult, intricate) | |
| elaborate(adjective, hard, difficult, grand) | |
| involved(adjective, hard, difficult, awkward) | |
| knotted(adjective, hard, difficult) | |
| labyrinthine(adjective, hard, difficult, intricate) |
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| APA | Smart Define. (2016). arduous thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/arduous/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "arduous thesaurus" https://smartdefine.org/arduous/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, arduous thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/arduous/thesaurus/synonyms>. |
| MLA | Smart Define. "arduous thesaurus" 26 February 2016. Web. 20 September 2026. <https://smartdefine.org/arduous/thesaurus/synonyms> |