How to Say "reason" in Spanish
The most common Spanish word for “reason” is “razón” — use 'razón' when referring to a general cause, explanation, or the logical faculty of the mind..
razón
Examples
¿Cuál es la razón de tu visita?
What is the reason for your visit?
motivo
moh-TEE-voh/moˈtiβo/

Examples
¿Cuál fue el motivo de la reunión?
What was the reason for the meeting?
No tengo ningún motivo para mentirte.
I have no motive/reason to lie to you.
Por motivos personales, no puedo asistir.
For personal reasons, I cannot attend.
Using 'Motivo'
To express 'for this reason' or 'because of', you often use 'por motivo de' or 'a causa de' rather than just 'por' followed by the noun.
Mixing up 'motivo' and 'razón'
Mistake: “They are mostly interchangeable, but 'motivo' often emphasizes the internal drive or circumstance, while 'razón' can also mean logic or sanity.”
Correction: You can usually use either, but 'motivo' fits slightly better when talking about the cause of an event or the drive behind an action.
causa
/kow-sah//ˈkawsa/

Examples
La lluvia fue la causa del accidente.
The rain was the cause of the accident.
No conocemos la causa principal del problema.
We don't know the main cause of the problem.
The Super Useful Phrase: 'a causa de'
The phrase 'a causa de' is your go-to for saying 'because of' or 'due to'. Just put it before the noun that is causing something. Example: 'El partido se canceló a causa de la nieve.' (The game was canceled because of the snow.)
'Causa' vs. 'Razón'
Mistake: “Using 'causa' when 'razón' (reason/justification) is more natural.”
Correction: 'Causa' is the root thing that makes something happen. 'Razón' is more about the logic or justification. For example: 'La causa del fuego fue un cortocircuito' (The cause of the fire was a short circuit). But, 'La razón por la que me fui es que estaba cansado' (The reason I left is that I was tired).
argumento
/ar-goo-MEN-toh//aɾɣuˈmento/

Examples
Presentó un argumento muy sólido a favor del cambio climático.
He presented a very solid argument in favor of climate change.
Mi jefe no aceptó mis argumentos para llegar tarde.
My boss did not accept my reasons for being late.
Argumento vs. Discusión/Pelea
Mistake: “Using 'argumento' to mean a heated fight or dispute.”
Correction: Use 'discusión' or 'pelea' for a verbal fight. 'Argumento' means the *point* or *reason* you are presenting, not the conflict itself.
lugar
/loo-GAR//luˈɡaɾ/

Examples
Su comportamiento dio lugar a muchas quejas.
His behavior gave rise to many complaints.
No hay lugar a dudas de que es la mejor opción.
There is no room for doubt that it is the best option.
Ese malentendido puede dar lugar a problemas serios.
That misunderstanding can lead to serious problems.
juicio
/HWEE-see-oh//ˈxwi.sjo/

Examples
Es una persona con mucho juicio y experiencia.
She is a person with a lot of good sense and experience.
¡Actúa con juicio! No seas impulsivo.
Use your head! Don't be impulsive.
Después de tanto estrés, casi pierdo el juicio.
After so much stress, I almost lost my mind.
Choosing between Razón, Motivo, and Causa
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