Wiktionary
vb. (en-past of: unhappen)
Usage examples of "unhappened".
Once I have unhappened something with a person, I can't unhappen it again, because that would be treading on my own trail, as it were.
So the first time I unhappened you, at the time of the kiss, I lost the ability to wipe out the rest of the interaction, because that would unhappen the first unhappening.
And I can unhappen myself as far back as a day, if I haven't unhappened something else in that time.
She didn't want to kiss him, and also suspected that there could be a lot more to it, all conveniently unhappened so she couldn't prove a thing if she complained to anyone else.
Now it was clear that the Sea Hag had taken over Ann Arky's body, and lost it when he unhappened the woman's arrival in Xanth.
If he unhappened her meeting with whoever else she might marry, she might just meet someone else, so he would gain nothing.
He could fetch some of that and put it on her after he unhappened the takeover.
He still wasn't quite used to her ability to remember unhappened things.
And it would have gotten worse, had not the Dastard finally caught on and unhappened the Possession.
He had unhappened her prior Possessions, so now she was being more careful.
Each time he unhappened one of her Possessions, she returned with another, and if she ever decided that he was not worth her while, she would come as an ogress and smash him into oblivion.
If he unhappened the Isle of Fellowship community now, he would not be able to unhappen the Sea Hag's Possession of the princess.
Oh--because that had been the Fellowship Community unhappened, not their own little group.
He surely knew whether he had unhappened anything, and he was cautious when he didn't understand something.
If I unhappened just your music, I wouldn't be able to go back and unhappen your exchange with Melody.