lest

UK: lɛst | US: lɛst

Definition

  1. conj. for fear that; in order to prevent the possibility that

Structure
les <old English "less">t <old English suffix>
Etymology

"Lest" originates from Old English þȳ lǣs þe, meaning "whereby less that." Over time, it contracted to lǣste and eventually "lest." The morpheme les reflects the comparative idea of "less" (avoiding an outcome), while -t is a fossilized suffix from Old English. The word evolved to function as a conjunction expressing precaution or fear of a negative consequence.

Examples

  1. She studied diligently lest she fail the exam.

  2. He spoke quietly lest he wake the baby.

  3. They left early lest they miss the train.

  4. Lock the door lest intruders enter.

  5. He saved money lest he face financial hardship.