Related Clues:

• Live
• Abide
• Stay
• Remain
• Roost, so to speak
• Live in
• Fixate (on)
• Reside
• Reflect (on)
• Reside (in)
• Obsess (on)
• Belabor, with 'on'
• Think anxiously about something
• Stay on the same topic too long
• Ruminate