vig·or·ous  (v ĭg ər- əs)
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adj.1. a. Strong and healthy; robust: "Her splendid, vigorous body lay still and relaxed under the loose folds of her clothing" (Willa Cather). b. Growing or spreading rapidly: a vigorous vine. 2. Characterized by or done with force and energy: "With a vigorous shake to get rid of the brine in his hair, he ran into the woods to hunt small game" (John Muir). See Synonyms at active. 3. Forceful; effective: a model of vigorous prose.
vigor·ous·ly adv. vigor·ous·ness n. |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
Indo-European Roots
Semitic Roots
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.
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