Verb prolong has 2 senses
  1. prolong, protract, extend, draw out - 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"
    --1 is one way to lengthen
    Derived forms: noun prolongation3, noun prolongation2, noun prolongation1
    Sample sentences:
    Somebody ----s something
    Something ----s something
  2. 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"
    --2 is one way to continue, uphold, carry on, bear on, preserve
    Derived forms: noun prolongation3, noun prolongation1
    Sample sentences:
    Somebody ----s something
    Something ----s something
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