noun
fierce battle; intense combat
A yojijukugo describing a battlefield thick with swords and a rain of bullets; used for extremely violent, chaotic combat.
その小説は剣林弾雨の戦場を生々しく描いている。
The novel vividly depicts a battlefield of fierce combat.
A yojijukugo composed of 剣 (sword), 林 (forest), 弾 (bullet), and 雨 (rain), literally 'forest of swords and rain of bullets'. The exact historical origin is uncertain.