突とっ発ぱつ的てき

na-adjective

sudden; unexpected; unforeseen

Describes events, actions, or changes that occur abruptly and without warning. Often used in formal or written contexts.

• 突とっ発ぱつ的てきな停てい電でんで会かい議ぎが中ちゅう断だんされた。

  The meeting was interrupted by a sudden power outage.

• 彼かれの突とっ発ぱつ的てきな行こう動どうに周まわりは驚おどろいた。

  People around him were surprised by his unexpected behavior.