backsword

/ˈbækˌsɔrd/
noun
  1. A type of sword with a single cutting edge, often used historically in fencing or combat.
    • He learned to wield a backsword during his training in traditional European martial arts.
    • The museum displayed a backsword from the 17th century with a brass hilt.
    • In historical reenactments, fighters use a backsword for its balance and sharp edge.
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