32 entries under idiom topic. ×

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lose ground(expression, failure)
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lose one's labor(expression, failure)
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make stuffy
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make vain efforts(expression, failure)
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not come up to scratch(verb, expression)
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not complete(expression, failure)
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not make the grade(verb, expression)
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prove insufficient
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sound like
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toil in vain(expression, failure)
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want of skill(expression, failure)
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wrong step(expression, failure)
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APASmart Define. (2015). flunk thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/flunk/thesaurus/synonyms
ChicagoSmart Define. 2015. "flunk thesaurus" https://smartdefine.org/flunk/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, flunk thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/flunk/thesaurus/synonyms>.
MLASmart Define. "flunk thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/flunk/thesaurus/synonyms>