Lest Burns免得烫伤
Lest Make以免犯
beware lest小心
Jonas Lest左光平
screening lest屏蔽试验
lest-失心人
field lest现场试验
flattening lest压扁试验
CONJ（连词） If you do something lest something unpleasant should happen, you do it to try to prevent the unpleasant thing from happening. 以防 [正式]
I was afraid to open the door lest he should follow me.
我当时害怕打开那个门惟恐他跟踪我。