/swu:p; swup/
v
1 [I, Ipr, Ip] ~ (down) (on sb/sth) come down suddenly with a rushing movement突然下降; 向下猛冲; 猛扑
*The owl swooped down on the mouse. 那只猫头鹰向着老鼠猛扑下来.
* Planes swooped (low) over the ship. 飞机低飞着掠过那艘船.
* (fig 比喻) Detectives swooped (on the house) at dawn. 侦缉人员于拂晓时（对那所房子）进行了突然搜查.
2 (phr v) swoop sth away/up (infml 口) seize or snatch the whole of sth in one movement 一下子抓住或抢走某物
*The robber swooped up the banknotes. 劫匪把钞票一把抢走了.

n
1 ~ (on sth/sb)
(a) swooping movement 突降; 向下猛冲; 猛扑.
(b) sudden and unexpected attack 袭击
*Police made a dawn swoop. 警方于拂晓时发动了突袭.
2 (idm 习语) at one fell swoop => fell2.