Unsay

[Sarah]

To recant or recall, as what has been said; to refract; to takeback again; to make as if not said.You can say and unsay things at pleasure. Goldsmith.

[Sarah]

When you say something you regret saying and wish you could unsay it.

[Merna]

Withdraw or retract (a statement)

[Richarddok]

take back what one has said

[MiguelANymn]

To retract; to recant; to deny what has been said.

[ScottLer]

To unsay means to withdraw or take back (something said), or to retract a previous statement, often as if it had never been said. Its used when someone wishes to remove, deny or apologize for something they have said earlier.

[Faizan Zahid]

un-sā′, v.t. to recall what has been said: to retract.—adj. Unsaid′.

[KalanNug]

To withdraw, retract (something said).

[Gregory]

To not have said (since this is physically impossible usually in the subjunctive, as I wish I could unsay).