Arduous
Arduous adjective - Requiring considerable physical or mental effort.
Usage example: climbing Mount Everest is an arduous, exhausting challenge
Complicated and arduous are semantically related In some cases you can use "Complicated" instead an adjective "Arduous".
Nearby Word: arduously
Complicated
Complicated adjective - Having many parts or aspects that are usually interrelated.
Arduous and complicated are semantically related in difficult topic. Sometimes you can use "Arduous" instead an adjective "Complicated".
Mutual synonyms
Related pairs
- complex and arduous
- complex and complicated
- demanding and arduous
- demanding and complicated
- difficult and arduous
- difficult and complicated
- heavy and arduous
- heavy and complicated
- hard and arduous
- hard and complicated
- tough and arduous
- tough and complicated
- abstruse and arduous
- abstruse and complicated
Both words in one sentence
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FreeSpace 2 does this with a flourish: at the end of an arduous, complicated and desperate campaign to destroy the Shivan dreadnought Sathanas which threatens the (known) galaxy, you learn that the Shivans have about a bazillion more such ships.
Source: Diabolus ex Machina -
In Medieval II: Total War the victor of a siege was usually determined by a chaotic melee at the gates, or whichever part of the walls had been breached, making assaulting a castle a long and arduous, if not complicated, affair.
Source: Storming the Castle
Cite this Source
Complicated and Arduous. (2016). Retrieved 2026, August 03, from https://thesaurus.plus/related/arduous/complicated
Arduous & Complicated. N.p., 2016. Web. 03 Aug. 2026. <https://thesaurus.plus/related/arduous/complicated>.
Complicated or Arduous. 2016. Accessed August 03, 2026. https://thesaurus.plus/related/arduous/complicated.
Google Ngram Viewer shows how "arduous" and "complicated" have occurred on timeline