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 gamification of wildfire containment has raised ethical questions about a system that could, in theory, offers gamblers a perverse incentive to find ways to prolong the devastation in order to win their bets.—Michael Gfoeller and David H. Rundell, Newsweek, 15 Jan. 2025 Grady lectures Blake on the fragility of life, teaching tough-love survival skills as a means of prolonging it.—Peter Debruge, Variety, 15 Jan. 2025 History tells us that prolonged decelerations like this one are rare and finite.—Peter Bendor-Samuel, Forbes, 14 Jan. 2025 With a 12-month extension prolonging his deal to 2026, Newcastle could command a reasonable fee for the 27-year-old, who has dropped out of the starting XI.—James McNicholas, The Athletic, 13 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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