whisker
noun uk/ˈwɪs.kər/ us/ˈwɪs.kɚ/
[ C ]（猫、鼠等动物的）须
any of the long, stiff hairs growing on the face of a cat, mouse, or other mammal
He watched the cat cleaning the milk off her whiskers. 他看着猫把胡须上的牛奶弄干净。
whiskers[ plural ] old-fashioned or humorous （尤指男子侧面或下巴上的）胡须;络腮胡子
the hair growing on a man's face, especially the sides and/or the lower part
Idioms
by a whiskeridiom 一丝儿，一点儿，很少量
by a very small amount
Last time she raced against the Brazilian, she won by a whisker. 上次她和那个巴西人赛跑，仅以微弱优势取胜。
come within a whisker of (doing) somethingidiom 差一点就做…；…差一点就发生了
If you come within a whisker of doing something, you almost do it or it almost happens to you.
Twice now she had come within a whisker of death. 到目前为止，她两次与死神擦肩而过。