sudden

an unexpected alteration in condition, situation, or course

an unexpected and rapid death

突然の動き

a quick, unexpected change in position

素早く、予期せぬ位置の変化

an unexpected, quick movement or change in position or direction

突然の攻撃

an abrupt and violent act of aggression

突然で暴力的な攻撃行為

an unexpected and serious situation requiring immediate action

a short, abrupt pull or twist

突然の変革

a rapid and complete change in form, appearance, or character

速く予期せず起こる変革を説明する

a fierce and destructive attack that begins unexpectedly

a formal term for an unexpected and rapid end, especially of a person or institution