undone(redirected from undo)
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what is done cannot be undone
You cannot reverse, change, or take back that which has already happened. This is a delicate situation, so you can't act impulsively. Keep in mind that what is done cannot be undone.
what's done cannot be undone
You cannot change what has already happened or come to pass, so there's no use worrying or stressing about it; what's done is done. I know this isn't the outcome we wanted, but what's done cannot be undone, so let's just try to make the most of a bad situation. I'm really disappointed in what you did, but what's done cannot be undone—let's just forget about it now.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
What's done cannot be undone.
Prov. You cannot change what has already happened. Jill: I wish I hadn't insulted Maria. Jane: What's done cannot be undone. Jill soon regretted telling Mike that she loved him, but she knew that what's done cannot be undone.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.