berserker       
noun [ C ] (also Berserker) uk/bəˈsɜː.kər/ us/bɚˈsɜ˞ː.kɚ/
 (北欧传说中的)狂暴战士
a warrior (= fighter), especially in old Norse (= Scandinavian) stories, who fights in a very violent and uncontrolled way
  The most well-known example of battle rage is the Viking berserker. 维京狂暴战士是战斗狂暴最著名的例子。 
 We don't need to be Berserkers or Kamikaze warriors. 我们不需要成为狂暴战士或者神风突击队。 
 - More examples
 - It would have been a great honour to have such a powerful berserker at my side in battle.
 - You can see colourful stories performed, watch live combat presentations, make masks and shields, be transformed into a "Viking Berserker" and take part in battle drills.
 - The warrior who takes on the strength and stamina of a bear is called "bearpants" or berserker.
 - A berserker was a fine thing if you just wanted to kill the enemy; but if you wanted to manoeuvre, he was harder to handle than a charging bull.
 - Now he was in a berserker rage.