摸门不着

Explanation: That somehow 　　Usage: Verb-object type; as predicate, adverbial; containing derogatory 　　Source: Qing Wu Jingzi "Scholars" the third chapter: "meal Jiaqijiaba, touch the door into the scope curse vain. Quit his wife's father back." 　　Examples: He was her whole too ~. Thesaurus:  not know why it is so, intangibility, extremely puzzled; be completely confused, mystery of mysteries— — extremely mysterious and abstruse, Figure it out, Puzzling, fathomless, Up on things vain, Couldn't find north, cannot distinguish whether it's genuine or fake,true or false, perplex Antonym Group:  deafening noise, Fakuizhenlong