"cryptic" synonyms, related words, and opposites

Similar:

esoteric, mystifying, concise, mysterious, incomprehensible, inscrutable, deep, sibylline, inexplicable, cryptical, more...

Opposite:

clear, explicit, straightforward, unambiguous, evident

Types:

cryptogram, crossword, puzzle, code, brain teaser, word search, logic problem, anagram, more...

Meter:

Colors:

charcoal, midnight blue, slate gray, forest green, burgundy, indigo, gunmetal, olive drab, maroon, teal

Crossword clues:

difficult to read, hard to figure out, mysterious letter, hard to discern, can't be understood, speaking in code, puzzle like, not plain, with hidden meaning, hard to guess