Lest

Part of speech: noun (n.)

Lust; desire; pleasure. [Obs.] Chaucer.

Part of speech: verb (v.)

To listen. [Obs.] Chaucer. Spenser.

Part of speech: adjective (a.)

Last; least. [Obs.] Chaucer.

Part of speech: conjunction (conj.)

1. For Love not sleep, lest thou come to poverty. Prov. xx. 18. Wherefore let him that thinketh he standeth he standeth take heed lest he fall. I Cor. x. 12.

2. That (without the negative particle); -- after certain expressions denoting fear or apprehension. I feared Lest I might anger thee. Shak.