The rebels were responsible for the massmurder of 400 civilians.
叛乱者对屠杀400名平民负有责任。
《牛津词典》
2
In effect, mass privatisation was massmurder.
大规模的私有化实际上是谋杀群众。
3
Conservatives don't want to make an issue of massmurder because then they would be confronted with the fact that the massacres are committed by people using guns.