( BrE ) ( NAmE fer·vor ) / ˈfɜːvə(r); NAmE ˈfɜːrv-/ noun
[ U ] very strong feelings about sth
SYN enthusiasm :
She kissed him with unusual fervour.
religious / patriotic fervour
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WORD ORIGIN
Middle English : via Old French from Latin fervor , from fervere to boil. Compare with fervent and fervid .