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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The actors, who met while making the 2005 action film Mr. and Mrs. Smith, were eventually declared legally single by a judge in 2019 as the divorce and custody battle prolonged.—Benjamin Vanhoose, People.com, 31 Dec. 2024 The country’s new leaders must recognize that a failure to meet the international community’s expectations of political reform and transparency risks prolonging the country’s exclusion, deepening its instability, and exacerbating the humanitarian crisis.—Karam Shaar, Foreign Affairs, 20 Dec. 2024 And, more recently, Frank Rubio became the first American to spend more than 365 straight days in space, after he and two Russian crewmates were forced to prolong their ISS mission when their Soyuz spacecraft sprang a leak.—Josh Dinner, Space.com, 18 Dec. 2024 What Happens Next Navarro is expected to file further appeals in the records case, potentially prolonging the legal battle.—Thomas G. Moukawsher, Newsweek, 17 Dec. 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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