lest /lest/ conj. 唯恐，免得 (从句中谓语多由should构成，有时用动词原形)：I feared lest she’d lose her life at sea. 我很害怕她在海中丧生。They spoke in whispers lest they should be heard.他们低声耳语唯恐被别人听到。We hid the money lest it should be stolen. 我把钱藏起来了，免得被人偷去。［考句］He was punished lest he should make the same mistake again.他受到惩罚，以免他再犯同样的错误。［考句］ While crossing the mountain area, all the men carried guns lest they should be attacked by wild animals.穿越山区时，人人都带上枪支，以免遭野兽袭击。