to die instantly
肝臓に猛毒が 正しく調理しないで食べれば 即死
I know.
即死?
Was it quick?
彼はその事故に遭い、即死した。
He was involved in the accident and killed on the spot.
彼は車にひかれて、即死した。
He was hit by a car and died right away.