noun
heavy damage; havoc; ravages
Refers to severe, often widespread damage or destruction, typically from disasters, war, or accidents. Somewhat formal and more common in written Japanese.
台風がもたらした惨害は想像を絶するものだった。
The havoc brought by the typhoon was unimaginable.
戦争の惨害を後世に伝える。
We pass on the ravages of war to future generations.