conj. 以免，避免；唯恐，担心
1.I used notes lest faulty memory should lead me astray.
我翻阅了所做的笔记，免得记错了而使我误入歧途。
2.Boil the oil soiled by the coil in the toilet lest it spoils.
把被盥洗室里的线圈弄脏的油煮开，以免变质。
3.He gripped his brother's arm lest he be trampled by the mob.
他紧抓着他兄弟的胳膊，怕他让暴民踩着。
4.Take care lest an adventure is now offered you, which, if accepted, will plunge you in deepest woe.
要当心你们面临的这场冒险，你们若是接受，这场冒险就回让你们陷入大祸事。
5.So that there seems a little fear, lest should there be another war!
所以人们似乎有点害怕，唯恐再发生一场战争！
6.We gave them bread, lest they should starve.
我们给他们面包，以免他们饿死。
7.Lest I tickle thee with my heel!
——不然我就用脚后跟给你挠痒痒！