血筋は争えない。

血筋は争えない。

Blood is thicker than water.

血筋(ちすじ)は争(あらそ)えない。

Chisuji wa arasoenai.

血筋 (ちすじ)

lineage; stock; strain; blood relationship

は (は)

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

Readings: ケツ、ち

Meaning: blood

Readings: キン、すじ

Meanings: muscle, sinew, tendon, fiber, plot, plan, descent

Readings: ソウ、あらそ.う、いか.でか

Meanings: contend, dispute, argue