How to Say "substantial" in Spanish
The most common Spanish word for “substantial” is “generoso” — use 'generoso' when referring to a generous portion or amount of something, often implying a positive or abundant quality.
generoso
heh-neh-ROH-sohxe.neˈɾo.so

Examples
El camarero nos sirvió un trozo de pastel muy generoso.
The waiter served us a very generous slice of cake (a large one).
Recibimos una donación generosa para nuestro proyecto de investigación.
We received a generous donation (a large amount) for our research project.
Using 'Generoso' for Things
When 'generoso' describes a thing (like a portion or a budget), it means the amount is large or plentiful. It carries the same positive feeling as describing a person.
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.
respetable
rreh-speh-TAH-blehrespeˈtaβle

Examples
Había una cantidad respetable de gente en el concierto.
There was a considerable amount of people at the concert.
Llevaban una velocidad respetable.
They were traveling at a substantial speed.
Generoso vs. Sustancial
Related Translations
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