미처 생각지 못하거나 예기치 못한 상태에서 매우 빠르게.
In a quick and unexpected manner, often without any prior warning.
예문:
"The weather changed suddenly, turning the sunny afternoon into a heavy thunderstorm."
"She suddenly realized that she had left her passport on the kitchen table."
"The car stopped suddenly when a small animal ran across the road."