The term ATMOSPHERE BAD can be summarized by two crossword solutions: MIASM (5 letters) and AURA (4 letters). MIASM is an archaic term for a noxious atmosphere or vapor, while AURA is a distinctive atmosphere or quality that surrounds a person or thing. Both terms refer to the atmosphere of a place or situation, but MIASM has a more negative connotation, suggesting something unpleasant or unhealthy.