lest

Definition

For fear that; that not; in order to prevent something from happening; in case.

Etymology

c. 1200, contracted from Middle English les te (“less that”), from Old English þȳ lǣs þe (“whereby less that”), from þȳ (instrumental case of demonstrative article þæt (“that”)) + lǣs (“less”) + þe (“that,” relative particle). The þȳ was dropped and the remaining two words contracted into leste.

Example Sentences

• "He won't go outside, lest he be eaten by those ravenous eagles."
• "I brought my notes lest faulty memory lead me astray."
• "I thought to haue told thee of it, but I fear'd / Leaſt I might anger thee."