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strenuous
Definition: (adjective) requiring energy and strength.
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Houghton MifflinAmerican Heritage® Dictionary of the English Language
Find definitions, spellings, and word suggestions in this free online searchable dictionary that features over 200,000 entries, 70,000 audio word pronunciations, and 900 full-page color illustrations.


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The American Heritage® Dictionary of the English Language, Fourth Edition.
Copyright © 2000 by Houghton Mifflin Company.
Published by the Houghton Mifflin Company. All rights reserved.
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