lest

lest

He ran away lest he should be seen.

Definition
  1. Conjunction:
    • With the intention of preventing (something undesirable); to avoid the risk of: "lest" introduces a clause expressing a reason for caution or an action taken to prevent a negative outcome.
    • For fear that: "lest" is used to indicate that someone is afraid that something might happen, often following verbs like "fear," "worry," or "be afraid."
Usage Examples
  • (We must hurry to avoid missing the train.)
  • (She spoke quietly because she was afraid someone might hear her.)
  • (He locked the door to prevent the children from escaping.)
Advanced Usage
  • "lest ... should": A formal construction where "lest" is followed by a clause using "should" to express a hypothetical or feared outcome.
    • They were afraid lest the plan should fail. (They feared that the plan might fail.)
  • "lest ... (not)": In older or very formal English, "lest" can be followed by a subjunctive verb without "should."
    • Take heed, lest you fall. (Be careful so that you do not fall.)
Variants and Related Words
  • Lest is an archaic or formal conjunction with no direct derived variants, but it is related to:
    • "for fear that" (phrase): a synonym expressing the same idea.
    • "in case" (phrase): a more common modern equivalent, though less formal.
Synonyms
  • For fear that: used to introduce a clause expressing a negative possibility.
    • He wrote down the instructions, for fear that he might forget. (He wrote them down because he was afraid of forgetting.)
  • In order to avoid: used to express purpose.
    • She checked the map, in order to avoid getting lost. (She checked the map to prevent getting lost.)
  • So that ... not: a more modern construction.
    • He whispered, so that the baby would not wake. (He whispered to prevent waking the baby.)
Related Idioms
  • Lest we forget: a fixed phrase often used in commemorative contexts, meaning "so that we do not forget."
    • We remember the soldiers, lest we forget their sacrifice. (We remember them to avoid forgetting their sacrifice.)
  • Lest there be any doubt: used to emphasize clarity or certainty.
    • I state this clearly, lest there be any doubt about my intentions. (I state this to remove any possible doubt.)