leave well enough alone


leave well enough alone
leave (or let) well enough alone
refrain from interfering with or trying to improve something that is satisfactory or adequate as it is

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leave well enough alone — see leave, 1
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Main Entry:alone
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leave well enough alone (or Brit leave well alone)
: to stop changing something that is already good enough

He just doesn't know when to leave well enough alone.

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Main Entry:leave

Useful english dictionary. 2012.