From Dictionary.comStrength - the quality or state of being strong; bodily or muscular power; vigor.
They are nouns. Strong, vigor, firmness, moral power, mental power, courage, bodily power, force and many more.
The word vigor means mental and physical health. It also means to do an activity with great energy. Common synonyms of vigor are power, force and energy.
The quality or state of being weak; want of strength or firmness; lack of vigor; want of resolution or of moral strength; feebleness., That which is a mark of lack of strength or resolution; a fault; a defect.
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Organic vigor is a term used in physical education. It refers to eating a healthy diet and getting exercise in order to make your organs strong, and the mental and plysical strength which can be obtained through diet and exercise.
"Eccentricity has always abounded when and where strength of character has abounded; and the amount of eccentricity in a society has generally been proportional to the amount of genius, mental vigor, and moral courage which it contained." http://www.answers.com/topic/john-stuart-mill-John Stuart Mill"The amount of eccentricity in a society has generally been proportional to the amount of genius, mental vigor, and moral courage it contained. That so few now dare to be eccentric marks the chief danger of the time." -John Stuart Mill"The lunatic fringe wags the underdog." -HL Mencken
viggor means strength so antonyms for vigor is weak
1. Physical or mental strength, energy, or force. 2. The capacity for natural growth and survival, as of plants or animals. 3. Strong feeling; enthusiasm or intensity.
Mechanical energy!:)
Active strength or force of body or mind; capacity for exertion, physically, intellectually, or morally; force; energy., Strength or force in animal or force in animal or vegetable nature or action; as, a plant grows with vigor., Strength; efficacy; potency., To invigorate.
The root word for "vigourous" is "vigor," which means physical strength or energy. Adding the suffix "-ous" to "vigor" turns it into an adjective, describing something full of vigor or energy.