👉 "Unhappen" is a phrase in American English that means something that has happened but it's not yet clear whether it will happen again or not. It can also be used to describe an event or situation that hasn't occurred yet, and may still have some potential for happening in the future. For example: - "There was no way he would unharmonize our relationship after all these years." - This sentence uses "unhappen" as a metaphorical phrase to express that