Enigma is a term used to describe a difficult problem or puzzle. It can be used to refer to a CRYPTOGRAM, which is a type of puzzle where the letters of a phrase or sentence are replaced with other letters or symbols. AMBIGUITY is another term associated with enigma, which refers to the state of having multiple meanings or interpretations. BEWILDERMENT is a feeling of confusion and perplexity, which is often experienced when trying to solve an enigma. The CRUX of an enigma is the most difficult part of it, and it is usually the part that needs to be solved in order to understand the whole puzzle. CONTRADICTION is another element of enigma, as it involves two or more statements that cannot both be true at the same time. A POSER is a RIDDLE or puzzle that is difficult to answer, and a MYSTERY is an unsolved problem or enigma. A RIDDLE is a type of enigma that requires the solver to think logically in order to find the answer. A closed book is an enigma that is impossible to solve, and a baffling thing is something that is very confusing and hard to understand.