Explanation: Risk: disaster; Weiran: No way, that has not yet formed. To prevent accidents or harm to not yet occurred before. Source: "Book of both economy": "The gentleman to think of suffering and anti-Yu." Gentlemen's line of Folk Song and Ballad ":" Gentlemen against possible accidents. " Examples: Chen Wen ~ are easy, in addition to those already suffering from the difficult. (Ming Ma Wensheng, "the Constitution to ask Refugee Tim sparse wind")