玄之又玄

Explanation: Taoist language originally described the road more than describe the subtle invisible ◇ very subtle and difficult to understand. 　　Usage: Partial official; as the predicate attribute; containing derogatory 　　Source: "I" the first chapter somewhat esoteric, all the wonderful door. " 　　Examples: ~ Ghost-off is the sixth scientist. ★ Liu Bannong "Zuo Yi doctrine" 　　Riddle: Hereby Thesaurus:  not know why it is so, intangibility, extremely puzzled; be completely confused, Figure it out, Puzzling, fathomless, Up on things vain, Couldn't find north, Touch door vain, cannot distinguish whether it's genuine or fake,true or false, perplex Antonym Group:  deafening noise, Fakuizhenlong