Etymology
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febrifuge (n.)

"medicine that reduces fever," 1680s, from French fébrifuge, literally "driving fever away," from Latin febris (see fever) + fugare "cause to flee, put to flight, drive off, chase away, rout," also used in reference to banishment and exile, derived verb from fuga "flight," from PIE *bhug-a-, suffixed form of root *bheug- (1) "to flee" (see fugitive (adj.)).

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Definitions of febrifuge

febrifuge (n.)
any medicine that lowers body temperature to prevent or alleviate fever;
Synonyms: antipyretic
From wordnet.princeton.edu