na-adjective, noun
extremely gruesome; lurid; violent; bloody; fierce
Describes something shockingly cruel, violent, or gruesome, often in a vivid or graphic way. Used for scenes, descriptions, or events.
その映画の凄絶な暴力描写に、観客は言葉を失った。
The audience was speechless at the movie's extremely gruesome depictions of violence.
事
The accident scene was a lurid sight.
Compound of 凄 (sei, 'uncanny, terrible') and 絶 (zetsu, 'extreme, surpass'). The exact historical derivation is uncertain, but the combination conveys an extreme degree of gruesomeness.