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理由
riyuu
What does "理由" mean in English?
reason彼が遅刻した理由は交通渋滞だった。
The reason he was late was traffic congestion.
How to use "理由" correctly: definitions and examples in English?
general
A cause, explanation, or justification for something.
彼女が怒っている理由は分かりますか？
Do you know why she is angry?
その決定の理由を説明してください。
Please explain the reason for that decision.
Can be used to refer to both positive and negative causes.
Related Phrases
Pro Tip
Formal vs. Informal Usage
In formal contexts, '理由' is often used with 'を' (e.g., '理由を説明する'). In informal speech, it can be used more flexibly.
Gold Rule
Reason vs. Cause
'理由' is more about justification, while '原因' focuses on the source of an event.
Word Origin
Composed of '理' (reason, logic) and '由' (cause, origin).
Usage Notes
Often used in formal and informal contexts to explain actions or decisions.
Word Breakdown
理
reason, logic
root由
cause, origin
root和英辞典