expression, godan verb (-su)
rain heavily; rain cats and dogs
Idiomatic expression for very heavy rain, literally 'to wash away cart axles'. Used in literary or emphatic descriptions of downpours.
昨夜は車軸を流すような雨だった。
Last night it rained so hard it was like a cloudburst.
車軸を流
I walked home in a torrential downpour.