From un- + say.
unsay (third-person singular simple present unsays, present participle unsaying, simple past and past participle unsaid)
- To withdraw, retract (something said).
- 1851, Herman Melville, Moby-Dick:
- And in the first place, you will be so good as to unsay that story about selling his head, which if true I take to be good evidence that this harpooneer is stark mad [...].
- To not have said (since this is physically impossible usually in the subjunctive, as I wish I could unsay).
- There are somethings I'd like to unsay... to my boss... right before he decided to fire me.