keep up

Verb
  1. Maintain a required pace or level (synset 201116393)
    "He could not keep up and dropped out of the race"
  2. Lengthen or extend in duration or space (synset 202685340)
    "We sustained the diplomatic negotiations as long as possible"; "prolong the treatment of the patient"; "keep up the good work"
  3. Keep in safety and protect from harm, decay, loss, or destruction (synset 202284977)
    "We preserve these archeological findings"; "The old lady could not keep up the building"; "children must be taught to conserve our national heritage"; "The museum curator conserved the ancient manuscripts"
  4. Keep informed (synset 200118572)
    "He kept up on his country's foreign policies"
  5. Prevent from going to bed at night (synset 200020442)
    "The anticipation of the trip kept the children up all night"; "I kept myself up all night studying for the exam"

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