Definitions: (1) emotional warmth <he pursues his study with ardor>; (2) intense feeling; fervent; (3) deeply devoted; zealous; (4) a bright spirit

Derivation: Latin, “to burn”

Quote: Virtue demands the active employment of an ardent mind in the promotion of the general good. No man can be eminently virtuous who is not accustomed to an extensive range of reflection. — William Godwin (1756–1836) English journalist