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furtive(obscure, clandestine, underground, unrevealed)
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on the QT(expression, idiom, obscure, clandestine)
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unenlightened(obscure, clandestine, underground, unrevealed)
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unfrequented(obscure, clandestine, underground, unrevealed)
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APASmart Define. (2015). undisclosed thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/undisclosed/thesaurus/synonyms
ChicagoSmart Define. 2015. "undisclosed thesaurus" https://smartdefine.org/undisclosed/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, undisclosed thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/undisclosed/thesaurus/synonyms>.
MLASmart Define. "undisclosed thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/undisclosed/thesaurus/synonyms>