prolong, sustain, keep up - lengthen or extend in duration or space; "We sustained the diplomatic negociations as long as possible"; "prolong the treatment of the patient"; "keep up the good work" --2is one way tocontinue, uphold, carry on, bear on, preserve Sample sentences: Somebody ----s something Something ----s something
conserve, preserve, maintain, keep up - 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" --3is one way tokeep Sample sentence: Somebody ----s something
keep up, keep abreast, follow - keep informed; "He kept up on his country's foreign policies" Sample sentences: Somebody ----s Somebody ----s PP