突如其来

Explanation: Conflict such as: a sudden. Unexpectedly sudden. 　　Usage: Partial official; for adverbial; describe the incident 　　Source: "From the Book of Changes": "as saying: 'If nothing unexpected capacity to'." 　　Examples: The first said: I was never met, ~, no wonder the concubine of the offended. (Yuan Wang Shih-fu, "The West Chamber" the second of the third off) Thesaurus:  be taken by surprise, Down from the heavens, very unexpectedly, impossible to defend effectively, dignity lose one's head Antonym Group:  As expected, really, really, Guo Ranruci, sure enough