1. a Scandinavian warrior who fought in a frenzied, trance-like state, believed to be invulnerable in battle
Usage: historical; also spelled berserk or berserker

1. wild, frenzied, or out of control
Usage: informal; derived from the noun

Examples

• The baresark warriors of Norse legend were said to enter a battle trance.
• He went baresark when he learned about the betrayal.
• The baresark fought without armor, relying on fury and strength.
• The crowd went baresark after the team scored the winning goal.
• Ancient texts describe baresarks as fearless and nearly unstoppable in combat.