Definitions

1. verb

to cease to happen or occur; to be no longer true or valid

“The rumor eventually unhappened after the company issued a statement denying it.”

2. verb

to become less likely or less probable

“The chances of rain unhappened as the sun came out.”

3. verb

to be undone or made ineffective

“The new policy unhappened the previous one, allowing employees to have Fridays off.”