51 entries under expression topic. ×

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by inference(idiom, latency implication)
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cloak and dagger(idiom, hidden, fraudulent)
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close as wax(idiom, concealment)
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committing perjury(fickle, untrustworthy, unprincipled, dirty-dealing)
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deep laid(idiom, cunning)
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dirty dealing(wrong, immoral, fickle, untrustworthy)
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double dealing(evil, corrupt, fickle, untrustworthy)
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fly by night(idiom, fickle, untrustworthy, unprincipled)
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hugger mugger
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hush hush
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in ambush(clandestine, underground, undisclosed)
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in camera(idiom, concealment)
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in holes and corners(idiom, hidden, fraudulent)
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in the know(idiom, sharp, smart, intelligent)
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mental reserve(idiom, concealment)
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not fair(wrong, unwarranted, unfair, unjustified)
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not true(adjective, unpredictable, fickle, variable)
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not true to(idiom, fickle, untrustworthy, unprincipled)
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not trustworthy(adjective, unpredictable, fickle, variable)
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of bad faith(idiom, fickle, untrustworthy, unprincipled)
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APASmart Define. (2015). underhand thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/underhand/thesaurus/synonyms
ChicagoSmart Define. 2015. "underhand thesaurus" https://smartdefine.org/underhand/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, underhand thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/underhand/thesaurus/synonyms>.
MLASmart Define. "underhand thesaurus" 13 April 2015. Web. 21 September 2026. <https://smartdefine.org/underhand/thesaurus/synonyms>