[treated as pl.]wild mammals and birds which are believed to be harmful to crops, farm animals, or game, or which carry disease, e.g. foxes, rodents, and insect pests 害兽;害鸟;害虫 ■parasitic worms or insects 体外寄生虫 ■(figurative)people perceived as despicable and as causing problems for the rest of society (喻)害人虫;坏分子 the vermin who ransacked her house. 洗劫她房子的歹徒。
派生 verminous adjective 语源
Middle English (originally denoting animals such as reptiles and snakes): from Old French, based on Latin vermis 'worm'