godan verb (-u), transitive verb
muster; call forth; rouse up
Transitive use, especially with feelings or inner strength such as 勇気, 元気, or 力. Often appears as 奮って, meaning to do something with courage or enthusiasm.
彼女は勇気を奮って、上司に意見を伝えた。
She mustered her courage and told her boss what she thought.
Everyone, please take part enthusiastically.
godan verb (-u), intransitive verb
be enlivened; be invigorated; be roused
Intransitive use for spirits, morale, or energy becoming stirred up. It is somewhat more literary or elevated than everyday expressions like 元気が出る.
勝利の知らせを聞いて、兵士たちの士気は大いに奮った。
When they heard news of the victory, the soldiers' morale was greatly roused.