noun, noun or participle which takes 'suru', transitive verb
withering gunfire; heavy fire
Describes intense, concentrated gunfire, often in military or combat contexts. Can be used as a noun or with する to mean 'to fire heavily'.
敵の猛射にさらされた。
They were exposed to withering enemy fire.
部隊は敵陣に猛射した。
The unit poured heavy fire into the enemy position.
Compound of 猛 (もう, 'fierce, intense') and 射 (しゃ, 'shoot, fire'). The exact historical derivation is uncertain, but the meaning is transparent from its components.