Verb protract has 1 sense
  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 protraction1, noun protraction2
    Sample sentences:
    Somebody ----s something
    Something ----s something
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