kept up (Adjective) — Kept in good condition.
kept up (Verb) — Maintain a required pace or level. ex. "He could not keep up and dropped out of the race"
kept up (Verb) — Lengthen or extend in duration or space. ex. "keep up the good work"
kept up (Verb) — Keep in safety and protect from harm, decay, loss, or destruction. ex. "The old lady could not keep up the building"
kept up (Verb) — Keep informed. ex. "He kept up on his country's foreign policies"
kept up (Verb) — Prevent from going to bed at night.