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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Yes, a bottle of red wine that’s been opened but unfinished can and should be stored in the fridge to prolong its shelf life, says Salyer, who notes that storing reds at a cool temperature slows the oxidation, which will keep the wine fresh for just a little longer.—Stacey Lastoe, Southern Living, 28 Nov. 2024 There’s no preserving this place, only prolonging its collapse.—Ben Rosenstock, Vulture, 24 Nov. 2024 What’s Next For Google Google plans to challenge the monopoly ruling, which would likely prolong the legal process.—Jack Kelly, Forbes, 22 Nov. 2024 If Mehta embraces the Justice Department's recommendations, Google will almost certainly appeal the punishments, prolonging a legal tussle that has dragged on for more than four years.—CBS News, 20 Nov. 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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