bloodbath       
noun [ S ] uk/ˈblʌd.bɑːθ/ us/ˈblʌd.bæθ/
 血洗,大屠杀
an extremely violent event in which a large number of people are killed
  Is there nothing that the outside world can do to prevent a bloodbath? 外界难道就不能采取任何行动来阻止大屠杀吗? 
 Any major confrontation with security forces would be likely to end in a bloodbath. 
Compare: bloodlettingbloodshed
 - More examples
 - He claims the region is too unstable and if troops are pulled out there would be a bloodbath.
 - A war between local drugs gangs ended in a bloodbath.
 - The revolution quickly descended into a bloodbath.
 - If you think the layoffs you've seen today are large, it's going to be a bloodbath in Detroit and in the Midwest.
 - There was a bloodbath on equity markets today as investors worry about the state of Europe's finances.
 - She warns an economic bloodbath awaits unless the Bank acts quickly to cut rates.