lengthen in time; cause to be or last longer; "We prolonged our stay"; "She extended her visit by another day"; "The meeting was drawn out until midnight"
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"
move to and fro; "The shy student lingered in the corner"
be undecided about something; waver between conflicting positions or courses of action; "He oscillates between accepting the new position and retirement"