HSK 7-9
疯
fēng动形
insane; mad; wild
他听到好消息高兴得快疯了。
Tā tīng dào hǎo xiāo xi gāo xìng de kuài fēng le.
He was almost wild with joy after hearing the good news.
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Appears across levels (7-9) in the HSK 3.0 word list.