| shrewd | |
| arch | |
| artful | |
| astute | |
| cagey | |
| calculating | |
| canny | |
| clandestine | |
| crafty | |
| cunning | |
| deceitful | |
| deep | |
| designing | |
| elusive | |
| evasive | |
| foxy | |
| furtive | |
| machiavellian | |
| secret | |
| secretive |
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| APA | Smart Define. (2016). sly thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/sly/thesaurus/narrower |
| Chicago | Smart Define. 2016. "sly thesaurus" https://smartdefine.org/sly/thesaurus/narrower (accessed September 20, 2026). |
| Harvard | Smart Define 2016, sly thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/sly/thesaurus/narrower>. |
| MLA | Smart Define. "sly thesaurus" 24 March 2016. Web. 20 September 2026. <https://smartdefine.org/sly/thesaurus/narrower> |