1. To provide evidence or proof to support a conclusion; to back up a conclusion with facts or substantive material
The researcher needed to substantiate her conclusion with empirical data before publishing the study.
A pesquisadora precisava fundamentar sua conclusão com dados empíricos antes de publicar o estudo.
2. To make a conclusion more solid, credible, or convincing by providing supporting evidence
The lawyer worked to substantiate the conclusion that the defendant was innocent.
O advogado trabalhou para fundamentar a conclusão de que o réu era inocente.