► 動詞急転  [きゅうてん]  [
急転する]    
meaning:  change  rank: 3☆ 
事態は急転した ⇨ The situation took a sharp turn
☆ 
彼の
容体は急転した ⇨ His condition took a sharp turn (for worse)  
(☛ Change 180 degrees, typically for worse)► 名詞急転  [きゅうてん]    
meaning:  change  rank: 3☆   
(☛ Change 180 degrees, typically for worse)More examples:- 状況は急転するかもしれないから安心してもいられない ⇨ The situation could do a U-turn, so we cannot relax