stirred up, be invigorated, flourish
JLPT1 G6 S16 F1521
奞# combines 大 stand outstretched (→ outstretched) + 隹 short, squat bird → bird spreading and flapping its wings. 奮 adds 田 field → bird in a field flapping its wings in preparing to take flight (compare 翻) → *vigorous exertion*; *spirited effort* → *muster courage*.
[Full Kanji Etymology List]