せいで

Because of (Blame)

Level 3Sounds Like seide

せいで = "Because of..." (Negative result/Blame)

How It Works

せいで is derived from the noun せい（所為）, which means "cause" or "fault." While it has a kanji form, it is almost exclusively written in hiragana in modern Japanese. It is used when you want to point out the reason for a failure, mistake, or unpleasant circumstance.

Grammar Rules:

  • Nouns: Noun + の + せいで (e.g., 雨（あめ）のせいで - Because of the rain)
  • Verbs: Plain form + せいで (e.g., 遅（おく）れたせいで - Because I was late)
  • い-Adjectives: Plain form + せいで (e.g., 暑（あつ）いせいで - Because it's hot)
  • な-Adjectives: Dictionary form + な + せいで (e.g., 有名（ゆうめい）なせいで - Because [they] are famous)

Key Nuances:
1. Negative Outcome: The result must be something bad. You cannot use it for happy surprises.
2. Blame: It can be used to blame others, external factors (like weather), or even oneself (自分（じぶん）のせいで - because of my own fault).
3. Sentence Ending: You can end a sentence with 〜せいだ or 〜せいです to say "It is because of..." or "It is the fault of..."

Examples (5)

  1. 雨のせいで、テニスの試合が中止になった。

    Because of the rain, the tennis match was canceled.

    Word by Word: Rain's fault-by, tennis match (subject) cancellation became.

    Here, the rain is blamed for the negative outcome of the match being canceled.

  2. バスが遅れたせいで、会議に間に合わなかった。

    Because the bus was late, I didn't make it to the meeting in time.

    Word by Word: Bus (subject) was late fault-by, meeting to in-time was-not.

    The speaker is expressing frustration that the bus's delay caused them to miss the start of the meeting.

  3. 最近忙しいのは、人手が足りないせいだ。

    The reason I've been busy lately is that we are short-staffed.

    Word by Word: Recently busy-thing (topic), manpower not-enough fault-is.

    This uses the sentence-ending form 'sei da' to identify the cause of a stressful situation.

  4. 私のせいで負けてしまって、ごめんなさい。

    I'm sorry that we lost because of me.

    Word by Word: Me of fault-by lose (regret), sorry.

    Using 'seide' with oneself is a common way to take responsibility for a failure.

  5. 暑いせいで、全然寝られませんでした。

    Because it was so hot, I couldn't sleep at all.

    Word by Word: Hot fault-by, at all could-not-sleep.

    An い-adjective (暑い) is used directly before 'seide' to explain a physical discomfort.

Common Mistakes

  • Using 'seide' for positive outcomes.

    先生のせいで、試験に合格しました。
    先生のおかげで、試験に合格しました。

    Using 'seide' makes it sound like passing the exam was a bad thing or that you are blaming the teacher. For positive results, use おかげで (thanks to).

  • Using volitional endings (requests, suggestions) after 'seide'.

    雨のせいで、家に帰りましょう。
    雨が降っているから、家に帰りましょう。

    You cannot follow 'seide' with a suggestion like 'let's...' or a command. Use a neutral reason marker like から instead.

How It Connects

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せいでLevel 3Because of (Blame)

Learn This First

To understand 'せいで' (because of/blame), you need to know how to modify nouns using verbs, adjectives, and other nouns. Since 'せい' (fault/cause) acts as a noun, it follows standard noun modification rules, including the use of the particle 'の' for noun-noun connections. Additionally, understanding the particle 'で' to indicate a reason or cause is helpful for grasping the overall structure.

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Words in This Pattern

所為