7
deep(adjective, sharp, intelligent, cunning, clever)
7
diplomatic(adjective, cunning, wise, prudent, subtle)
7
elusive(adjective, mean, smooth, false, clever)
7
intriguing(adjective, quiet, mean, smooth, sensitive)
7
knavish
7
machiavellian
7
resourceful(adjective, smart, bright, original, intelligent)
7
traitorous(adjective, mean, smooth, cunning, clever)
6
adroit(adjective, keen, smart, shrewd, clever)
6
cagy
6
covert(adjective, quiet, mean, clever, secret)
6
impish(adjective, mean, smooth, cunning, clever)
6
perfidious(adjective, false, corrupt, dishonest, deceitful)
6
serpentine(adjective, false, cunning, misleading, illusory)
6
shady(adjective, corrupt, dishonest, cunning, deceitful)
6
sneaking(adjective, mean, honest, dishonest, deceitful)
6
two-faced(adjective, false, corrupt, dishonest, deceitful)
6
untrustworthy(adjective, dishonest, dubious, unreliable, suspicious)
6
wary(adjective, smooth, sharp, careful, cunning)
5
dexterous(adjective, smart, sensitive, shrewd, clever)
10 years ago|25k views|share |citing 
APASmart Define. (2016). sly thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/sly/thesaurus/synonyms
ChicagoSmart Define. 2016. "sly thesaurus" https://smartdefine.org/sly/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, sly thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/sly/thesaurus/synonyms>.
MLASmart Define. "sly thesaurus" 24 March 2016. Web. 21 September 2026. <https://smartdefine.org/sly/thesaurus/synonyms>