血ちで血ちを洗あらう

expression, godan verb (-u)

engage in a bloody feud; quarrel with one's own flesh and blood

Idiomatic expression describing violent conflict within a family or close group. The literal image is 'washing blood with blood', implying a cycle of revenge or bitter internal strife.

• あの兄きょう弟だいは血ちで血ちを洗あらう争あらそいを続つづけている。

  Those brothers are locked in a bloody feud.

• 血ちで血ちを洗あらうような内うち輪わもめは避さけたい。

  I want to avoid a family quarrel that's like washing blood with blood.