falchion
/ˈfɔːltʃən/noun
- historical a broad, slightly curved sword with the cutting edge on the convex side〈史〉（刀刃在凸面上的）弯刃大刀。
词源
Middle English fauchon, from Old French, based on Latin falx, falc - 'sickle'. The -l- was added in the 16th cent. to conform with the Latin spelling.