sudden
US /ˈsʌd.ən/
UK /ˈsʌd.ən/

1.
突然の, 急な
occurring or done quickly and unexpectedly or without warning
:
•
There was a sudden change in the weather.
天候が突然変わった。
•
He made a sudden decision to quit his job.
彼は突然仕事を辞める決断をした。
突然の, 急な
occurring or done quickly and unexpectedly or without warning