Arduous
Arduous adjective - Requiring considerable physical or mental effort.
Declivitous and arduous are semantically related In some cases you can use "Declivitous" instead an adjective "Arduous".
Nearby Word: arduously
Declivitous
Declivitous adjective - Sloping down rather steeply.
Arduous and declivitous are semantically related in course topic. You can use "Arduous" instead an adjective "Declivitous".
Cite this Source
Declivitous and Arduous. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/arduous/declivitous
Arduous & Declivitous. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/arduous/declivitous>.
Declivitous or Arduous. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/arduous/declivitous.
Google Ngram Viewer shows how "arduous" and "declivitous" have occurred on timeline