Unsay (verb)

To retract or take back something that was said.

Origin:

From un- (not) + say (to speak or express).

Examples:

1. He wished he could unsay the hurtful words.
2. She tried to unsay her promise but it was too late.
3. He regretted the rash statement and tried to unsay it.
4. She realized her mistake and tried to unsay her accusation.
5. He didn't know how to unsay the lie he told.