lest

lestlestD.J.:[lest]K.K.:[lɛst]conj.1.■惟恐I feared lest I should be late again.我惟恐自己再迟到。2.■免得Be careful lest you (should) fall from the tree.小心, 不要从树上掉下来。

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lest[lest]conj.1.■以免，免得；惟恐：He got up early that morning lest he should miss the train.他那天早上起得很早，生怕误了火车。2.■[用在表示“担心、恐惧、危险”等的词后，引出从句]：The parents were afraid lest he should fail in the final examination.父母担心他期末考试不及格。

lestlest[lest]conj.1.■[所连接的状语从句里常用should或原形动词]以免; 生怕; 唯恐2.■[=that][用于fear, worry等词之后起连接作用, 无实际意义]Be careful lest you fall from that tree.要当心, 以免从树上摔下来。I was afraid lest he might come too late.我怕他来得太晚。