fixate

/ˈfɪkseɪt/
verb
  1. To focus one's attention or gaze intensely on something.
    • The baby would fixate on the bright mobile hanging above her crib.
    • During the lecture, I couldn't help but fixate on the clock on the wall.
    • He tends to fixate on small details and forget the big picture.
  2. To become obsessed or preoccupied with a particular idea, person, or thing.
    • The media tends to fixate on celebrity scandals.
    • After the argument, she would fixate on what she should have said.
    • Some people fixate on their mistakes and can't move forward.
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