How to Say "significant" in Spanish
The most common Spanish word for “significant” is “importante” — use this for general importance or when something has great consequence, often expressing a moral or practical necessity.
importante
eem-por-TAHN-tehimpoɾˈtante

Examples
Es muy importante estudiar para el futuro.
It is very important to study for the future.
Es muy importante estudiar.
It's very important to study.
Tengo una reunión importante mañana.
I have an important meeting tomorrow.
Él es una figura importante en la política local.
He is an important figure in local politics.
Same for Everyone
Importante ends in '-e', which is great news! It means you use the same form for both masculine and feminine things. For example: 'el libro importante' (the important book) and 'la casa importante' (the important house).
Placement is Key
Usually, importante comes after the thing it describes, just like in English. For example, 'una reunión importante' (an important meeting). Placing it before ('una importante reunión') adds a bit of emphasis or a more formal tone.
Your Go-To Verb: 'ser'
To say something is important, you'll almost always use the verb 'ser'. For example, 'Ser honesto es importante' (Being honest is important).
The 'Es importante que...' Rule
Mistake: “Es importante que tú estudias mucho.”
Correction: Es importante que tú estudies mucho. When you say it's important for *someone else* to do something, the verb that follows needs a special ending. This is a huge pattern in Spanish!
significativo
seeg-nee-fee-kah-TEE-bohsiɣnifikaˈtiβo

Examples
Hubo un aumento significativo en las ventas este mes.
There was a significant increase in sales this month.
Recibir esa carta fue muy significativo para mi abuela.
Receiving that letter was very meaningful for my grandmother.
Ella me lanzó una mirada significativa y entendí que debíamos irnos.
She gave me a telling look and I understood we had to leave.
Matching the Ending
Since this is a word that describes things, the ending must change to match the item. Use 'significativo' for masculine items (un cambio) and 'significativa' for feminine items (una mejora).
Natural Sentence Order
In Spanish, you usually place 'significativo' after the thing you are describing. For example: 'un progreso significativo' sounds more natural than putting it before.
Confusing with 'Significante'
Mistake: “Ese es un cambio significante.”
Correction: Ese es un cambio significativo. 'Significante' is a very technical term used in linguistics; for 'important' or 'large,' always use 'significativo'.
considerable
kon-see-deh-rah-blehkonsideˈɾaβle

Examples
Tengo una cantidad considerable de tarea hoy.
I have a considerable amount of homework today.
El retraso en el aeropuerto fue considerable.
The delay at the airport was significant.
La empresa invirtió una suma considerable de dinero.
The company invested a sizeable sum of money.
One Form for All
In Spanish, this word is gender-neutral. Because it ends in 'e,' you don't need to change the ending for masculine or feminine nouns. It is always 'considerable' for one thing and 'considerables' for many.
Where to Put It
While you can put this word before or after the noun, placing it after the noun (e.g., 'un retraso considerable') is the most natural way to emphasize the size or impact.
Using it for 'Thoughtful'
Mistake: “Using 'considerable' to describe a person who is kind or thoughtful.”
Correction: Use 'considerado' for a thoughtful person. 'Considerable' only describes things that are large or important.
relevante
reh-leh-BAHN-tehreleˈβante

Examples
Tu opinión es muy relevante para este proyecto.
Your opinion is very relevant to this project.
No encontré ninguna información relevante en el informe.
I didn't find any relevant information in the report.
Es un cambio pequeño, pero relevante.
It's a small but significant change.
One ending for all
This word is the same whether you are talking about a man, a woman, a masculine object, or a feminine object. It always ends in -e.
Mistaking with 'Importante'
Mistake: “Using 'importante' when you specifically mean 'connected to the topic.'”
Correction: While 'importante' works for general importance, use 'relevante' to show that something specifically applies to the current situation or discussion.
notable
noh-TAH-blehnoˈtaβle

Examples
Hubo una mejoría notable en sus notas este trimestre.
There was a remarkable improvement in his grades this term.
La diferencia de precio es notable.
The difference in price is noticeable.
One Form for All
This word ends in -e, which means it stays the same whether you are describing a masculine or feminine person or thing. You say 'un cambio notable' and 'una mejoría notable'.
sustancial
soos-tahn-SYALsustanˈsjal

Examples
Hubo un cambio sustancial en los resultados del examen.
There was a substantial change in the exam results.
Recibió una mejora sustancial en su salario este mes.
He received a significant improvement in his salary this month.
No hay una diferencia sustancial entre estas dos opciones.
There is no substantial difference between these two options.
One form for both genders
Adjectives ending in '-l' like 'sustancial' don't change for masculine or feminine nouns. You can say 'un cambio sustancial' (masculine) or 'una mejora sustancial' (feminine).
Placement for emphasis
While it usually comes after the noun, putting it before (un sustancial cambio) makes it sound more poetic or formal.
Confusing with 'sustancioso'
Mistake: “Comí una cena muy sustancial.”
Correction: Comí una cena muy sustancioso.
sensible
sen-SEE-blehsenˈsible

Examples
La empresa experimentó un aumento sensible en sus ventas después de la campaña.
The company experienced a noticeable increase in its sales after the campaign.
Hubo una mejora sensible en la calidad del sonido.
There was a significant improvement in sound quality.
Describing Data
This meaning is often used when discussing statistics, data, or technical results, emphasizing that the change is large enough to matter or be easily perceived.
razonable
rah-thoh-NAH-bleh (Spain) / rah-soh-NAH-bleh (L. Am.)raθoˈnaβle

Examples
El proyecto requirió un esfuerzo razonable de todo el equipo.
The project required a considerable effort from the entire team.
Hemos visto un avance razonable en las negociaciones.
We have seen moderate/significant progress in the negotiations.
Quantifier
In this meaning, 'razonable' acts like a quantifier, emphasizing that the amount or degree was sufficient or impressive, not just 'sensible'.
General vs. Specific Significance
Related Translations
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