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let sleeping dogs lie

lɛt ˈsliːpɪŋ dɒɡz laɪ

Animals
neutral
intermediate
Literally:
To not disturb dogs that are sleeping

What does "let sleeping dogs lie" mean?

  1. To avoid interfering with a situation that is currently stable
  2. To not bring up old problems or controversies

Examples

  • Don't bring up the old argument—let sleeping dogs lie.
  • We should let sleeping dogs lie rather than reopening the investigation.
  • It's best to let sleeping dogs lie regarding his past.

Origin

From the practical wisdom of not disturbing a sleeping dog that might wake up aggressive. First recorded in the 14th century.

How to use it

Advises against stirring up settled issues. Implies that interference could cause problems.

Similar expressions

leave well enough alone
don't stir up trouble
avoid old issues

Opposites

dig up the past
reopen old wounds
stir things up

Related idioms

  • kill two birds with one stone

    To accomplish two goals with a single action

  • let the cat out of the bag

    To reveal a secret accidentally

  • elephant in the room

    An obvious problem or issue that everyone is aware of but no one wants to discuss

  • don't count your chickens before they hatch

    Don't assume success before it actually happens

  • hold your horses

    To wait and be patient

  • fish out of water

    Someone who feels awkward or uncomfortable in a particular situation

Use it in a practice answer

Try "let sleeping dogs lie" in a CELPIP-style Speaking or Writing task. The AI feedback tells you whether your word choice worked.

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