猛威|もういmoui[1]atamadaka (head-high)

1. nounfury; power; menace
   インフルエンザが都市部としぶで猛威もういを振ふるった。↗

   The flu struck the metropolitan area.

• Related激烈さWrittenWritten/formal prose: the degree to which something is intense. 「猛威」 is the fierce power of disasters, epidemics or forces running rampant.
• Related獰猛さWrittenWritten/formal prose: the degree of ferocity, said chiefly of animals, as a beast's ferocity. 「猛威」 is used mainly of natural disasters and epidemics.
• Related荒れ狂うことNeutralNeutral: the raging of storms, waves and the like — a dynamic, verbal description. 「猛威」 is a noun, typically in 「猛威を振るう」.
• Related荒々しいことNeutralNeutral: roughness or wildness, said mostly of people's character and behavior. 「猛威」 describes the power of disasters.
• Related狂暴さWrittenWritten/formal prose: the degree of ferocity or savagery, said mostly of people and animals. 「猛威」 never describes character.

Use 「猛威」 for the fierce power of typhoons, epidemics or forces running rampant, as in 「猛威を振るう」. For animal or human ferocity pick 「獰猛さ」 or 「狂暴さ」; for raging storms or waves 「荒れ狂うこと」; for rough character or behavior 「荒々しいこと」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 激はげしい力ちから。