Describes something powerfully energetic, wild, or aggressive. Often used with nouns like 勢い, 暑さ, or 動物.
今年の夏は猛暑だった。
This summer was intensely hot.
その犬は猛スピードで走った。
The dog ran at a ferocious speed.
Prefix used in compounds to indicate an extreme degree. Common in words like 猛暑, 猛吹雪, 猛勉強.
猛吹雪で視界がまったくきかなかった。
In the severe blizzard, visibility was completely lost.
He drove the car at a breakneck speed.
The athletes trained intensely before the tournament.