Middle English fervour, from Anglo-French & Latin; Anglo-French fervur, from Latin fervor, from fervēre seefervent
noun
intensity of feeling or expression
intense heat
booing and cheering with almost equal fervor
passionfervorardorenthusiasmzeal mean intense emotion compelling action. passion applies to an emotion that is deeply stirring or ungovernable. fervor implies a warm and steady emotion.