keep up

Found in Anh - Anh (Wordnet)

Definition Verb (transitive) : To prevent someone from sleeping : To cause someone to remain awake, especially at night. To maintain or continue something at the same level or standard : To sustain an activity, effort, or condition without allowing it to decline or stop. To preserve or sustain something in good condition : To protect or maintain the state or existence of something. Verb (intran...