ଅର୍ଥ : Something that baffles understanding and cannot be explained.
							ଉଦାହରଣ : 
							How it got out is a mystery.
							It remains one of nature's secrets.
							
ସମକକ୍ଷ : closed book, mystery, secret
ଅର୍ଥ : A difficult problem.
ସମକକ୍ଷ : brain-teaser, conundrum, riddle