Demostrar una afirmación con pruebas.
To prove a claim with evidence.
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See how the word “fundamentar” is used in sentences
No pudo fundamentar su relato. — He could not substantiate the story.
¿Puedes fundamentarlo con recibos? — Can you substantiate that with receipts?
Necesitamos documentos para fundamentar la reclamación. — We need documents to substantiate the claim.
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