extend and lengthen imply a drawing out in space or time but extend may also imply increase in width, scope, area, or range.
extend a vacation
extend welfare services
lengthen a skirt
lengthen the workweek
prolong suggests chiefly increase in duration especially beyond usual limits.
prolonged illness
protract adds to prolong implications of needlessness, vexation, or indefiniteness.
protracted litigation
Examples of prolong in a Sentence
Additives are used to prolong the shelf life of packaged food.
High interest rates were prolonging the recession.
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Rather than helping my family heal, Dylann Roof's death sentence prolongs our pain.—Yaakov Katz, Newsweek, 7 Feb. 2025 They are met by a broken system that prolongs and profits off their suffering.—Amy Fischer, San Diego Union-Tribune, 6 Feb. 2025 There will always be another holiday, birthday and other excuses to prolong a relationship that has run its course.—Jocelyn Solis-Moreira, CNN, 1 Feb. 2025 Another standout feature includes channel stitching to prevent the stuffing from bunching and drifting, prolonging its plushness season after season.—Miles Walls, Better Homes & Gardens, 30 Jan. 2025 See all Example Sentences for prolong
Word History
Etymology
Middle English, from Middle French prolonguer, from Late Latin prolongare, from Latin pro- forward + longus long
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