cryptic
adj.
1630s, "hidden, occult, mystical," from Late Latin crypticus, from Greek kryptikos "fit for concealing," from kryptos "hidden" (see crypt). Meaning "mysterious, enigmatic" is recorded from 1920. Related: Cryptically.
〔李〕[crypt;-ica.] a.秘密的，神密的； 隐藏的 ←crypt (GK krytein)=to hide 藏