孛然 bórán suddenly Origin Definitions Defs Strokes Stroke Words Sentences Sents 孛 bó [abrupt change] (bound form) used to describe a sudden change in facial expression, usually due to anger, as in 孛然 bórán然 rán adverbadjective [state] Used as a suffix after an adjective or adverb to describe a state or manner, similar to the English suffix "-ly".