翻ㄈㄢfān然ㄖㄢˊrán

忽然改變。《文選·陸機·謝平原內史表》：「而一朝翻然更以為罪，蕞爾之生尚不足𠫤，區區本懷，實有可悲。」也作「幡然」。

英suddenly and completely (realize, change one's strategy etc), also written 幡然[fan1 ran2]