vigour

noun

1. (countable, uncountable)Active strength or force of body or mind; a capacity for exertion, physically, intellectually, or morally; energy.

   “The vigour of this arm was never vain”

   “Mr. Elliot's frank statement that "sloth and untidiness are indefensible" is a sign that the task will be tackled with vigour.”

   “A compound of eggs boiled with myrrh, pepper, and cinnamon, taken on several successive days, is recommended by Arabs for strengthening amorous vigor.”

2. (countable, uncountable)Strength or force in animal or vegetable nature or action.

   “A plant grows with vigour.”

3. (countable, uncountable)Strength; efficacy; potency.

   “But in the fruithful earth: there first receiv'd / His beams, unactive else, their vigour find.”