I was preparing to take my exams when my dad suddenly passed away.
My superior died suddenly of a cerebral hemorrhage yesterday.
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 from a heart attack.
When someone experiences a hurry death it's a very 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.