Duel /(?)/

Du·el

Duel

n.
  1. A combat between two persons, fought with deadly weapons, by agreement. It usually arises from an injury done or an affront given by one to the other.

Phrases & Compounds
Trial by duel
a combat between two persons for proving a cause; trial by battel.

Duel

v. i. & t.
  1. To fight in single combat. [Obs.]