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