swoop          
verb [ I ] uk/swuːp/ us/swuːp/
 (尤指为进攻而从高处)俯冲,向下猛扑
to move very quickly and easily through the air, especially down from a height in order to attack
  The eagle swooped down to snatch a young rabbit. 鹰俯冲下来抓一只小兔子。 
  informal(为围捕而)突然袭击 
to make a sudden attack on a place or group of people in order to surround and catch them
  Undercover police swooped on three houses in the city at 5.00 this morning. 今天早上5点,便衣警察突击搜查了城里的三栋房子。