How to Say "the reason" in Spanish
The Spanish word for “the reason” is “porque” — B1 level.

Examples
No entiendo el porqué de tu enojo.
I don't understand the reason for your anger.
Ella nunca explicó el porqué de su decisión.
She never explained the reason for her decision.
Todo en esta vida tiene un porqué.
Everything in this life has a reason.
'The Reason' as a Noun
When you see 'el porqué', it's a noun. It acts just like 'el libro' (the book) or 'el problema' (the problem). You can say 'el porqué' (the reason) or 'los porqués' (the reasons).
Always Has an Accent
As a noun, 'porqué' is always written as one word with an accent on the 'e'. This helps you tell it apart from 'porque' (because).
Forgetting the Article 'el'
Mistake: “No sé porqué.”
Correction: No sé el porqué. When you mean 'the reason' as a standalone thing, you need to include 'el' or 'un' before it, just like any other noun.
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