demostrado
“demostrado” means “proven” in Spanish. It has 2 different meanings depending on context:
proven, established
Also: demonstrated
📝 In Action
Es un hecho demostrado que el ejercicio mejora la memoria.
B1It is a proven fact that exercise improves memory.
La eficacia del nuevo medicamento ya está demostrada.
B2The effectiveness of the new medication is already established (proven).
shown, proved
📝 In Action
Hemos demostrado mucha paciencia con este proyecto.
A2We have shown a lot of patience with this project.
¿Quién había demostrado que esto era posible antes que tú?
B1Who had proved that this was possible before you?
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✏️ Quick Practice
Quick Quiz: demostrado
Question 1 of 2
Which sentence uses 'demostrado' as an adjective (describing a quality)?
📚 More Resources
👥 Word Family▼
📚 Etymology▼
The word comes directly from the Latin verb *dēmonstrāre*, which meant 'to point out' or 'to show clearly'. The Spanish word 'demostrado' is simply the past form of that verb, meaning 'having been shown'.
First recorded: Medieval Spanish period (around 13th century)
Cognates (Related words)
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Frequently Asked Questions
What is the difference between 'demostrado' and 'probado'?
Both mean 'proven.' 'Demostrado' often implies a logical or formal presentation of evidence (like a scientific proof or a public showing), while 'probado' can be used more generally, often meaning 'tested' or 'tried and true' (like a proven recipe).
Why does 'demostrado' sometimes change its ending and sometimes not?
It changes when it acts like an adjective (describing something, usually after 'ser' or 'estar'). It stays fixed (always ending in -o) when it combines with the verb 'haber' to form compound tenses (like 'he demostrado').