na-adjective, noun
Literary or formal word describing extreme cruelty, horror, or atrocity. Rare in everyday speech; more common in written descriptions of war, violence, or severe suffering.
その小説は戦争の惨烈な現実を描いている。
The novel depicts the atrocious reality of war.
惨烈な事件のニュースが世界中に衝撃を与えた。
News of the horrific incident shocked the world.