The Word of the Day comes from "THE THOUSAND AUTUMNS OF JACOB DE ZOET" by David Mitchell.
FEBRIFUGE
noun noun: febrifuge; plural noun: febrifuges
a medicine used to reduce fever. "she employed a risky febrifuge and the fever finally broke"
Origin
late 17th century: from French fébrifuge, from Latin febris ‘fever’ + fugare ‘drive away’. Compare with feverfew.