godan verb (-ru), transitive verb
kill with a blade; slice off; lop off
Used for killing a person or animal with a sword, knife, or similar bladed weapon, or for slicing/lopping off a body part or object with a decisive cutting motion. Stronger and more violent than 切る.
侍が敵を斬った。
The samurai killed his enemy with his sword.
彼は刀で相手の腕を斬り落
He sliced off his opponent's arm with a katana.