91 entries under mysterious topic. ×

9
deep(adjective, hard, evil, obscure, humble)
9
perplexing(adjective, obscure, difficult, dark, strange)
8
concealed(adjective, cover, evil, obscure, difficult)
7
inexplicable(adjective, obscure, dark, strange, uncertain)
6
indecipherable(adjective, dark, uncertain, unintelligible)
6
oracular(adjective, obscure, dark, uncertain, doubtful)
6
secretive(adjective, obscure, strange, secret)
4
private(adjective, obscure, reticent, unknown)
4
sibylline(adjective, dark, uncertain, unfathomable)
4
uncertain(adjective, obscure, difficult, dark, doubtful)
3
unintelligible(adjective, obscure, difficult, dark, uncertain)
2
knotty(adjective, evil, obscure, difficult, sophisticated)
2
sphinxlike(dark, strange, uncertain, inexplicable)
1
Delphian(adjective, evil, obscure, dark, uncertain)
1
anagogic(adjective, evil, deep, secret)
1
backstairs(close, private, reticent, taciturn)
1
buttoned up(expression, private, reticent, taciturn)
1
cagey(private, reticent, taciturn, covert)
1
clammed up(expression, private, reticent, taciturn)
1
complicated(adjective, evil, obscure, difficult, sophisticated)
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APASmart Define. (2016). cryptic thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/cryptic/thesaurus/synonyms
ChicagoSmart Define. 2016. "cryptic thesaurus" https://smartdefine.org/cryptic/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, cryptic thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/cryptic/thesaurus/synonyms>.
MLASmart Define. "cryptic thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/cryptic/thesaurus/synonyms>