CRYPTIC
cryptic
(adjective) having a puzzling terseness; “a cryptic note”
cabalistic, kabbalistic, qabalistic, cryptic, cryptical, sibylline
(adjective) having a secret or hidden meaning; “cabalistic symbols engraved in stone”; “cryptic writings”; “thoroughly sibylline in most of his pronouncements”- John Gunther
cryptic, cryptical, deep, inscrutable, mysterious, mystifying
(adjective) of an obscure nature; “the new insurance policy is written without cryptic or mysterious terms”; “a deep dark secret”; “the inscrutable workings of Providence”; “in its mysterious past it encompasses all the dim origins of life”- Rachel Carson; “rituals totally mystifying to visitors from other lands”
Source: WordNet® 3.1
Etymology
Adjective
cryptic (comparative more cryptic, superlative most cryptic)
Having hidden meaning.
Mystified or of an obscure nature.
Involving use of a code or cipher.
Of a crossword, or a clue in such a crossword, using, in addition to definitions, wordplay such as anagrams, homophones and hidden words to indicate solutions.
(zoology) Well camouflaged; having good camouflage.
(zoology) Serving as camouflage.
(biology, not comparable) Apparently identical, but actually genetically distinct.
(zoology) Living in a cavity or small cave.
Synonym: cryptozoic (less common)
Noun
cryptic (plural cryptics)
(informal) A cryptic crossword.
Source: Wiktionary
Cryp"tic (krp"tk), Cryp"tic*al (-t-kal), a. Etym: [L. crypticus, Gr.
Definition: Hidden; secret; occult. "Her [nature's] more cryptic ways of
working." Glanvill.
Source: Webster’s Unabridged Dictionary 1913 Edition