ˈkɒnsɜː(ɹ)v ˈfɒləʊ ˈfɑloʊ meɪnˈteɪn pɹəˈzɜːv pɹəˈzɝv pɹoʊˈlɔŋ pɹəʊˈlɒŋ səˈsteɪn prevent from going to bed at night The anticipation of the trip kept the children up all night I kept myself up all night studying for the exam keep informed He kept up on his country's foreign policies maintain a required pace or level He could not keep up and dropped out of the race keep in safety and protect from harm, decay, loss, or destruction 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 lengthen or extend in duration or space We sustained the diplomatic negotiations as long as possible prolong the treatment of the patient keep up the good work