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Pronunciation of Lest: Learn how to pronounce Lest in English correctly

Learn how to say Lest correctly in English with this tutorial pronunciation video.

Oxford dictionary definition of the word lest:

conjunction
formal
with the intention of preventing (something undesirable); to avoid the risk of:
he spent whole days in his room, wearing headphones lest he disturb anyone
(after a clause indicating fear) because of the possibility of something undesirable happening; in case:
she sat up late worrying lest he be murdered on the way home
Origin:
Old English thȳ lǣs the ‘whereby less that’, later the læste

There are very few contexts in English where the subjunctive mood is, strictly speaking, required: lest remains one of them. Thus the standard use is she was worrying lest he be attacked (not lest he was …) or she is using headphones lest she disturb anyone (not … lest she disturbs anyone). See also subjunctive.