The term 'PREVENT FROM ENTERING' can be summarized by four crossword solutions: DEBAR (5 letters), EXCLUDE (7 letters), BAR (3 letters), and KEEPOUT (7 letters). DEBAR means to prevent someone from entering or participating in something, while EXCLUDE means to prevent someone or something from being included. BAR is a verb meaning to prevent someone from entering a place, and KEEPOUT is an adjective meaning not allowed to enter. All of these words are related to the idea of preventing someone or something from entering a place or situation.