strenuous

From Latin strenuus (“quick”).

• IPA^(key): /ˈstɹɛnjuəs/
• Hyphenation: stren‧u‧ous

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strenuous (comparative more strenuous, superlative most strenuous)

1. Having great vigour or energy; forceful.

   Synonyms: ardent, earnest, eager, energetic, determined, resolute, vigorous, zealous

   strenuous exercise

   strenuous activity

2. (of a task) Requiring great exertion; very laborious
   • 1961, J. A. Philip, “Mimesis in the Sophistês of Plato”, in Proceedings and Transactions of the American Philological Association 92, page 467:

     We can achieve this god‐likeness only by unremitting and strenuous effort of the intellect.

• strenuity
• strenuosity

• “strenuous”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.
• “strenuous”, in The Century Dictionary […], New York, N.Y.: The Century Co., 1911, →OCLC.
• “strenuous”, in OneLook Dictionary Search.