vigorous

UK: /ˈvɪgərəs/ US: /ˈvɪgərəs/ ,(vig′ər əs)

WordReference Random House Learner's Dictionary of American English © 2025

vig•or•ous /ˈvɪgərəs/   adj. 

1. full of vigor:
   a vigorous effort to finish on time.
2. strong;
   active:
   a vigorous young man.
3. energetic;
   forceful:
   a vigorous personality.
4. powerful in action or in effect:
   vigorous law enforcement.
vig•or•ous•ly, adv. 

WordReference Random House Unabridged Dictionary of American English © 2025

vig•or•ous  (vig′ər əs), adj. 

1. full of or characterized by vigor:
   a vigorous effort.
2. strong;
   active;
   robust:
   a vigorous youngster.
3. energetic;
   forceful:
   vigorous steps; a vigorous personality.
4. powerful in action or effect:
   vigorous law enforcement.
5. Botany growing well, as a plant.

• Medieval Latin vigorōsus. See vigor, -ous
• Old French
• Middle English 1300–50

vig′or•ous•ly, adv. 
vig′or•ous•ness, n. 
Synonyms

• 2. sturdy, sound, healthy. See active. 
• 3. powerful.

Antonyms

• 1. –5. weak.

Collins Concise English Dictionary © HarperCollins Publishers::

vigorous / ˈvɪɡərəs/ adjective

1. endowed with bodily or mental strength or vitality; robust
2. displaying, involving, characterized by, or performed with vigour: vigorous growth

ˈvigorously adverb