un- + marry
unmarry (third-person singular simple present unmarries, present participle unmarrying, simple past and past participle unmarried)
- (transitive) To undo the action of marrying somebody.
1883, Anthony Trollope, Mr. Scarborough's Family:
- But there can be no doubt that John Scarborough and Ada Sneyd were married at Rummelsburg, and that it will be found to be impossible to unmarry them.
1909, Miles Franklin, Some Everyday Folk and Dawn:
- If you like to exercise your authority I'll run away and you can't unmarry me.