siren
/ˈsaɪərən; `saɪrən/ n
1 device that makes a long loud sound as a signal or warning 汽笛; 警报器
an air-raid siren 空袭警报器
a police siren 警察用的警报器
an ambulance/a fire-engine racing along with its sirens wailing 响著警报器急驰而过的救护车[消防车].
2 (in Greek mythology) one of a number of winged women whose songs lured sailors to their destruction （希腊神话中的）塞壬（半鸟半女人的怪物, 常用美妙的歌声引诱航海者触礁毁灭）.
3 woman regarded as fascinating and dangerous 妖艳而危险的女人.