preoccupy

/pri:'ɔkjupai/
Verb
  1. occupy or take possession of beforehand or before another or appropriate for use in advance
    • the army preoccupied the hills
  2. engage or engross the interest or attention of beforehand or occupy urgently or obsessively
    • His work preoccupies him
    • The matter preoccupies her completely--she cannot think of anything else
preoccupy
His studies preoccupy him for hours each evening.