勃然 (bórán): suddenly (especially of anger)

Meanings

Tā tīng le zhè jù huà bórán dà nù.

On hearing that, he flew into a rage.

Jīngjì bórán xīngqǐ, chāochū yùqī.

The economy rose vigorously, beyond expectations.

usage

Most common in the fixed phrase 勃然大怒 (bórán dà nù, to fly into a rage). Outside that collocation it's literary.

勃 bó

然 rán