急きゅう展てん開かい

急展開する · noun or participle which takes 'suru'

Meanings

rapid development; sudden turn of events

Describes a situation, story, or plan that changes quickly and dramatically. Often used in news, narratives, and discussions of unexpected progress.

〈事こと〉が急きゅう展てん開かいするfor a situation/event to take a sudden turn
捜そう査さは思おもいがけない方ほう向こうへ急きゅう展てん開かいした。
The investigation suddenly took an unexpected turn.
急きゅう展てん開かいを見みせるto show a sudden, dramatic turn of events
事じ件けんはその後ご、急きゅう展てん開かいを見みせた。
The case then took a sudden and dramatic turn.
急きゅう展てん開かいを迎むかえるto reach a sudden turning point (in a story, plot, etc.)
物もの語がたりは最さい終しゅう回かいで急きゅう展てん開かいを迎むかえる。
The story reaches a sudden turning point in the final episode.

展てん開かいN2
展開 describes the general development or unfolding of events without implying speed, while 急展開 emphasizes that the development happens suddenly and quickly.
急きゅう転てん
急転 focuses on the abrupt change itself, whereas 急展開 highlights how a situation unfolds or develops rapidly.
急きゅう変へんN1
急変 is typically used for sudden changes in weather, health, or circumstances, while 急展開 refers to a rapid development in a story, situation, or plan.
どんでん返がえし
どんでん返し is a colloquial term for a dramatic plot twist or reversal, while 急展開 is a more neutral, formal term for any rapid development.

停てい滞たいN1
停滞 means stagnation or a lack of progress, the opposite of the rapid, dramatic movement implied by 急展開.

回かいN4
急展開 is counted with 回 when referring to how many times such a sudden turn of events occurs, as in 急展開が二回あった。

Compound of 急 (きゅう, 'sudden, rapid') and 展開 (てんかい, 'development, unfolding'). The reading is the standard on'yomi for each kanji.