verb
to create or perform spontaneously or without preparation
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During the conference, the speaker had to improvise when the PowerPoint presentation failed to load.
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I had to improvise a Halloween costume at the last minute because I couldn't find anything to wear.
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When the band's guitar string broke on stage, the guitarist had to improvise and keep playing with only five strings.
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Life is like a game of chess, sometimes you need to improvise and adapt to unexpected moves.