せいにする

expression, suru verb (irregular)

blame (someone/something); lay the blame on

Used in the pattern 〜のせいにする to attribute fault or responsibility to a person, thing, or situation. Often implies an unfair or subjective assignment of blame.

• 彼かれは自じ分ぶんの失しっ敗ぱいを他た人にんのせいにした。

  He blamed his own failure on others.

• 天てん気きのせいにしないで、ちゃんと準じゅん備びしよう。

  Don't blame the weather; let's prepare properly.