The term 'fixate (on)' can be summarized by two crossword solutions: 'OBSESS' (6 letters) and 'DWELL' (5 letters). Fixating on something means to focus intently on it, often to the exclusion of other things. It is a form of intense concentration that can be either positive or negative. Obsessing is a more extreme form of fixating, where one's thoughts become preoccupied with a certain subject or idea. Dwelling is a less intense form of fixating, where one's attention is held for a longer period of time.