prowl
verb [ I or T ] uk/praʊl/ us/praʊl/
（打猎等时）悄悄来回游走（于），潜行
to move around quietly in a place trying not to be seen or heard, such as an animal does when hunting
There have been reports of a masked man prowling in the neighbourhood. 有人报告说有一个蒙面人在附近出没。
At night, adult scorpions prowl the desert for (= trying to catch) insects. 在夜晚，成年蝎子在沙漠里潜行觅食昆虫。
informal Unable to sleep, he prowled (= walked without purpose) (about/around) the hotel corridors. 他睡不着，就在旅馆的走廊里徘徊。
prowl
noun uk/praʊl/ us/praʊl/
be on the prowl 悄然潜行
to be moving around quietly in a place trying not to be seen or heard
There was a fox on the prowl earlier. 早些时候有只狐狸出没于此。
His photographs of cheetahs on the prowl were stunning.
The police dog went on the prowl, sniffing for drugs.
Mountain lions have been spotted on the prowl near here, so be careful while out hiking.
She filmed a pride of lions on the prowl for elephants.