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How to Say "certainty" in Spanish

English → Spanish

certeza

sair-TAY-sahθeɾˈte.θa

nounB1
Use 'certeza' when referring to the abstract state of being sure about a fact or a future event.
A brightly colored, simple puzzle piece dropping perfectly into its final matching space in a larger, solid shape, symbolizing certainty and assurance.

Examples

Tengo la certeza de que mañana hará sol.

I have the certainty that it will be sunny tomorrow.

Necesitamos más datos para tener absoluta certeza.

We need more data to have absolute certainty (sureness).

Ella habló con tanta certeza que nadie dudó de su palabra.

She spoke with such certainty that no one doubted her word.

Gender Reminder

'Certeza' is always a feminine noun, so you must use 'la' (the) or 'una' (a) before it, like 'la certeza' or 'una certeza'.

Using 'Con Certeza'

To express something definitely happened or will happen, use the phrase 'con certeza.' It acts like an adverb: 'Lo sé con certeza' (I know it for sure).

Mixing with Adjectives

Mistake: “Using *cierto* (the adjective 'certain') when you need the noun: 'Yo quiero cierto.'”

Correction: Use the full noun phrase: 'Yo quiero tener la certeza.' (I want to have the certainty.)

seguridad

se-goo-ree-DAHDseɣuɾiˈðað

nounB1
Use 'seguridad' when describing a person's confident demeanor or their firm belief in their own abilities or knowledge.
A young person standing tall and confidently on the peak of a small, stable mountain, symbolizing self-assurance.

Examples

Habló con mucha seguridad durante la entrevista.

He spoke with a lot of confidence during the interview.

Necesitas tener más seguridad en ti misma.

You need to have more confidence in yourself.

Tengo la seguridad de que todo saldrá bien.

I have the certainty that everything will turn out well.

'Seguridad' vs. 'Confianza'

Mistake: “Using 'confianza' when you mean certainty.”

Correction: 'Seguridad' is best when you are sure of a fact. 'Tengo la seguridad de que 2+2=4.' (I'm certain that 2+2=4). 'Confianza' is more about trust in a person or process. 'Tengo confianza en ti.' (I trust you).

convicción

nounB2
Choose 'convicción' when emphasizing a deeply held belief or a strong personal assurance, often about moral or ethical matters.

Examples

Tengo la convicción de que todo saldrá bien.

I have the conviction that everything will turn out well.

Certeza vs. Seguridad

Learners often confuse 'certeza' and 'seguridad'. Remember that 'certeza' is about the state of being sure of a fact, while 'seguridad' is more about confident presentation or self-assurance. You can have 'certeza' about something without speaking with 'seguridad'.

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