garantie

garantie is feminine in French.

guarantee

From Middle French garantie, from Old French garantie, guarantie (“protection, defense”), from Old French garantir, guarantir (“to warrant, vouch for something”), from Old French garant, guarant, warant (“a warrant; warranter, supporter, defender, protector”), from Frankish *warand (“a warrant”), from Frankish *warjan (“to fend for, designate something as true, vouch for”), from Proto-Germanic *warjaną (“to defend, protect”), from Proto-Indo-European *wer- (“to close, cover, protect, save, defen