to die abruptly and unexpectedly, or the occurrence of such a death, usually due to a latent medical condition

to be taken by surprise; to be caught without warning because something happens so suddenly

suddenly; abruptly; unexpectedly

hastily; all of a sudden; hurried and unexpected

hurried; hasty; abrupt; specifically emphasizing a sudden or unexpected nature.

sudden infant death syndrome (SIDS); crib death

suddenly or unexpectedly

to happen or break out suddenly (of an event, war, or medical condition)