202 entries under adjective topic. ×

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in private(expression, unknowing, taciturn, uncommunicative)
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in the background(expression, idiom, isolated, taciturn)
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in the dark(expression, idiom, obscure, dark)
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incog(underhanded, privy)
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indirect(dishonest, deceitful)
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indiscernible(obscure, dark, unseen)
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intelligence(secret, spy, covert, undercover)
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intriguing
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invisible(obscure, dark, unseen)
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mystic(obscure, dark, unseen)
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mystical(obscure, dark, unseen)
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noiseless
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oblique(dishonest, deceitful)
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out-of-the-way(deep, unpublished)
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out of view(expression, idiom, obscure, dark)
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personal(cover, obscure, dark, equivocal)
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pretend
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privy(cover, obscure, dark, equivocal)
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radical(experimental, subversive)
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remote(cover, obscure, dark, equivocal)
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APASmart Define. (2015). under cover thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/under_cover/thesaurus/synonyms
ChicagoSmart Define. 2015. "under cover thesaurus" https://smartdefine.org/under_cover/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, under cover thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/under_cover/thesaurus/synonyms>.
MLASmart Define. "under cover thesaurus" 13 April 2015. Web. 27 September 2026. <https://smartdefine.org/under_cover/thesaurus/synonyms>