continues; "simplified Chinese + せい", "な adjective + なせい", "noun + のせい".
means; "It's all wrong..." "Because..."; "Probably because...". It means that the foregoing item causes bad results in the latter item, and the speaker has a strong tone of blame and regret.
❶股べの句きいがある せいで, half-part foodべられなった. (Because I was picky about food, I only ate half of it.)
❷生生生生邒生生生邒生生生邒手生生邒手生生生生生生生生生生生生生生生生生生生生生生生生生生生生生生生生生生生生生生生生生生生生生生生生生生生生生生生生生� (Perhaps it's because of a cold, I can't concentrate on my work today.)
❸うちのテレビワいいせいか , 日いことがある. (Maybe because my TV is old, sometimes there is no image.)
❹Sleep at night, 可典のはげの せいだ. (I can't sleep at night because of noise.)
Note☆; ①『~せいかか』 indicates a reason that is not very certain.
②『~を~せいにする』 means "blam the blame..." For example, "self-decided failure, people are せいにする" blame others for their own failure