French fièvre

← Middle French fievre (inherited)

← Old French fievre (inherited)

← Proto-Indo-European *dʰegʷʰris (derived)

← Proto-Indo-European *dʰegʷʰ- (mention)

← Latin febris (inherited)

→ English ague (mention)

→ French enfiévrer (confix)

→ Walloon five (cognate)