猛威を振るう もういをふるう Also written 猛威をふるう, 猛威を奮う Meanings Expression, Godan verb to rage (of a storm, flu, etc.); to be on a rampage; to be rampant; to wreak havoc Kanji 猛 fierce. Read as モウ. 威 might 振 swing. Read as ふるう. Common phrases 世界中で猛威を振るう 新型コロナウイルスが猛威を振るう Jinuma: Japanese Dictionary · Word lists