keep up


  • maintain a required pace or level;
    • "He could not keep up and dropped out of the race"
  • lengthen or extend in duration or space;
    • "keep up the good work"
  • keep in safety and protect from harm, decay, loss, or destruction;
    • "The old lady could not keep up the building"
  • keep informed;
  • prevent from going to bed at night;