Synonyms|146Antonyms|9|Broader|0Narrower|0Related|46
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intractable
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lubricious(fickle, untrustworthy, unprincipled, dirty-dealing)
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lying(fickle, untrustworthy, unprincipled, dirty-dealing)
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mercentary(fickle, untrustworthy, unprincipled, dirty-dealing)
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mischievous
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moonlighting(fickle, untrustworthy, unprincipled, dirty-dealing)
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non-compliant
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not true to(expression, idiom, fickle, untrustworthy, unprincipled)
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obstreperous
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of bad faith(expression, idiom, fickle, untrustworthy, unprincipled)
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on the QT(expression, idiom, fickle, untrustworthy, unprincipled)
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on the quiet(expression, idiom, fickle, untrustworthy, unprincipled)
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perjurious(fickle, untrustworthy, unprincipled, dirty-dealing)
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polygamous(fickle, untrustworthy, unprincipled)
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quicksilver(fickle, untrustworthy, unprincipled, dirty-dealing)
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rebellious
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recalcitrant
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remiss
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restive
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snake in grass(expression, idiom, fickle, untrustworthy, unprincipled)
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APASmart Define. (2015). undutiful thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/undutiful/thesaurus/synonyms
ChicagoSmart Define. 2015. "undutiful thesaurus" https://smartdefine.org/undutiful/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, undutiful thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/undutiful/thesaurus/synonyms>.
MLASmart Define. "undutiful thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/undutiful/thesaurus/synonyms>