Sudden Death
noun, verbal noun
A sudden death makes for just that, a sudden death.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
母の急死
mother's sudden death
兄の急死
brother's sudden death
父の急死
father's sudden death
父が急死した時、私は高校生でした。
I was a high school student when my dad suddenly passed away.
マルちゃんのところのおじいさん、モチがノドにつまって急死だったんだって。
Apparently, the old man at Maru-chan's place died suddenly when a sticky rice cake got stuck in his throat.
彼とはよくケンカになっちゃって、それが本当にイヤだったんだけど、今ではケンカもできなくなっちゃってすっごく悲しいよ。まさか急死しちゃうなんて思ってもみなかったからさ。
I often argued with my boyfriend and I hated it, but I even miss the arguments now. I never expected that he would drop dead.