How to Say "reliability" in Spanish
The most common Spanish word for “reliability” is “formalidad” — use this word when 'reliability' means being dependable and trustworthy in keeping promises or commitments..
formalidad
/for-mah-lee-DAHD//foɾmaliˈðað/
Examples
Admiro su formalidad; siempre cumple con lo que promete.
I admire his reliability; he always fulfills what he promises.
En este trabajo se requiere mucha formalidad.
A lot of professionalism is required in this job.
Le falta formalidad para liderar el proyecto.
He lacks the seriousness needed to lead the project.
Gender Pattern
Most Spanish words ending in '-dad' are feminine. Always use 'la' or 'una' with formalidad.
Abstract Quality
This word describes a quality a person has, similar to how we use 'reliability' in English.
Mistaken for 'Formalness'
Mistake: “Thinking it only refers to wearing a suit.”
Correction: In Spanish, it more often describes someone who is dependable and keeps their word.
seriedad
/seh-ree-eh-DAHD//seɾjeˈdad/
Examples
Me gusta la seriedad con la que estudias.
I like the seriousness with which you study.
Esta empresa destaca por su seriedad y puntualidad.
This company stands out for its reliability and punctuality.
Dada la seriedad de su enfermedad, necesita reposo absoluto.
Given the gravity of his illness, he needs absolute rest.
Always Feminine
Spanish nouns ending in '-dad' are always feminine. Always use 'la' or 'una' with this word.
Abstract Noun
This word describes a quality rather than a physical object, so it is rarely used in the plural form.
The 'Seriosidad' Error
Mistake: “Muchos estudiantes dicen 'seriosidad'.”
Correction: Se dice 'seriedad'. English speakers often try to turn the adjective 'serio' into 'seriosidad' because of 'serious-ness', but 'seriedad' is the only correct form.
validez
/bah-lee-DEHS//baliˈdes/
Examples
No dudo de la validez de tus razones.
I don't doubt the validity of your reasons.
El estudio científico fue criticado por su falta de validez.
The scientific study was criticized for its lack of validity.
Para asegurar la validez del experimento, repetimos las pruebas.
To ensure the validity of the experiment, we repeated the tests.
Abstract Quality
This word is often used with 'de' to explain what is being measured (la validez de + noun).
Confusing with 'Valor'
Mistake: “El valor de tu argumento es alto.”
Correction: Use 'validez' for logic. 'Valor' usually refers to price, importance, or courage.
fundamento
/foon-dah-MEN-toh//fundaˈmento/
Examples
Ese chico no tiene fundamento; siempre está bromeando en momentos serios.
That boy has no common sense; he's always joking at serious moments.
Es un hombre de mucho fundamento.
He is a very serious and reliable man.
Haz las cosas con fundamento.
Do things with proper care and seriousness.
Describing People
When used for people, it usually follows the verb 'tener' (to have) or 'ser' (to be).
Formalidad vs. Seriedad
Related Translations
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