증상이 나타난 직후 또는 아무런 예고 없이 발생하는 예상치 못한 갑작스러운 죽음.
An unexpected and rapid death occurring shortly after the onset of symptoms or without any prior warning.
예문:
"The medical examiner investigated the case as a potential sud to rule out foul play."
"New research aims to identify genetic markers that may predispose individuals to sud."