fer ‧ vour BrE AmE British English , fervor American English /ˈfɜːvə $ ˈfɜːrvər/ noun [uncountable]
[ Date: 1300-1400 ; Language: Old French ; Origin: ferveur , from Latin fervor , from fervere 'to boil' ]
very strong belief or feeling:
religious fervour
revolutionary fervour
patriotic fervor