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English definition of “fizzle out”

fizzle out

verb [I] uk phrasal verb with fizzle   /ˈfɪz.əl/ us  
to gradually end, often in a disappointing or weak way: They went off to different universities and their relationship just fizzled out.Coming to an endCausing something to end
(Definition of fizzle out from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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