80 entries under expression topic. ×

1
secretly mischievous
1
street smart(adjective, smart, shrewd, clever)
1
thinking twice(considerate, cautious, prudent, suspicious)
1
top secret(clandestine, underground, undisclosed)
1
under false pretense(idiom, clandestine, underground, undisclosed)
1
under wraps(dishonest, cunning, secret, sneaky)
1
walking on eggs(considerate, cautious, prudent, suspicious)
1
watching out(considerate, cautious, prudent, suspicious)
1
wised up(sharp, smart, intelligent, clever)
0
handling with kid gloves(idiom, considerate, cautious, prudent)
0
all sheer
0
artfully cunning
0
clever fox
0
cloak and dagger(idiom, quiet, intriguing)
0
close as wax(idiom, concealment)
0
concluding piece
0
dastardly person(noun, creep, rake, rogue)
0
deep laid(idiom, cunning)
0
dirty dealing(dishonest, deceitful, underhanded)
0
dirty trick
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APASmart Define. (2016). sly thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/sly/thesaurus/synonyms
ChicagoSmart Define. 2016. "sly thesaurus" https://smartdefine.org/sly/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, sly thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/sly/thesaurus/synonyms>.
MLASmart Define. "sly thesaurus" 24 March 2016. Web. 20 September 2026. <https://smartdefine.org/sly/thesaurus/synonyms>