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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Levine would be fired for season 2 and later producers would tweak that ratio — naturally preferring the Superman aspects — but also going to cartoonish lengths to prolong its eponymous romance.—Joshua Rivera, Vulture, 13 Nov. 2024 The predictably tepid response to their plans in Ukraine and the West also fits into narratives of Western intransigence, a key Russian talking point, as if the West that (allegedly) caused the war in the first place is prolonging and exploiting it to weaken Russia.—Michael Kimmage, Foreign Affairs, 7 Nov. 2024 Rapamycin, a small molecule that has been shown to prolong the lifespan, was given to the flies next.—New Atlas, 2 Nov. 2024 The strike began last month and was prolonged last week after the union rejected Boeing’s latest labor proposal .—Lisa Kailai Han, CNBC, 30 Oct. 2024 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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