“Whose fault was the accident?” “It was his fault!”
「事故は誰のせいだった？」「彼のせいだ！」
We use this word to lay blame on someone (or maybe something) that caused something bad to happen. It is important not to blame everything on others, but also not to blame yourself for everything!
この言葉で悪いことを起こした人（たまには物）をとがめます。すべてを他人のせいにするのはだめですが、全部を自分のせいにするのもよくないです！
