66 entries under idiom topic. ×

1
under the surface
1
under the table(expression, adjective, unknowing, clandestine)
1
wrapped in clouds
0
be hidden
0
carefully quarded
0
clear as mud(expression, unintelligibility)
0
cloak and dagger(expression, fraudulent)
0
close quarters
0
communicated covertly
0
dense foliage
0
examine and study
0
hard to explain(expression, hard, tricky, complicated)
0
hard to solve(expression, hard, tricky, complicated)
0
hidden from sight(expression, adjective, secret, concealed)
0
hidden from view(expression, adjective, secret, concealed)
0
in a corner(expression, unknowing, hermetical, unbriefed)
0
in holes and corners(expression, fraudulent)
0
in petto(expression, concealment)
0
in the background(expression, isolated, unknowing, reclusive)
0
in the boonies(expression, isolated, reclusive, uncompanionable)
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APASmart Define. (2015). hidden thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/hidden/thesaurus/synonyms
ChicagoSmart Define. 2015. "hidden thesaurus" https://smartdefine.org/hidden/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, hidden thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/hidden/thesaurus/synonyms>.
MLASmart Define. "hidden thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/hidden/thesaurus/synonyms>