Be preoccupied with something is a phrase that describes when someone is so focused on a particular thing that it becomes an obsession. This phrase can be broken down into three different crossword solutions: OBSESS (6 letters), OBSESSED (8 letters), and FIXATE (6 letters). OBSESS is defined as to think about something constantly and often anxiously, while OBSESSED is the past tense of OBSESS. FIXATE is defined as to focus one's attention on something obsessively. All three words describe the same concept of being overly focused on something to the point of obsession.