The term 'legally prohibit' can be summarized by three crossword solutions: DEBAR (5 letters), ENJOIN (6 letters), and ESTOP (5 letters). DEBAR is a legal term meaning to exclude or bar someone from a certain activity or privilege. ENJOIN is a legal term meaning to order or command someone to do something or to refrain from doing something. ESTOP is a legal term meaning to prevent someone from doing something. All three terms refer to legally prohibiting someone from taking an action.