fundamentar

Senses

1. 1.

   to base, to ground, to found

   To establish something on a foundation or basis

2. 2.

   to support, to substantiate, to justify

   To provide reasons or evidence for an argument, decision, or claim

Examples

• "O advogado fundamentou seu argumento em precedentes jurídicos."

  The lawyer based his argument on legal precedents.

• "É importante fundamentar suas opiniões com dados concretos."

  It's important to support your opinions with concrete data.

• "A teoria está fundamentada em anos de pesquisa científica."

  The theory is grounded in years of scientific research.

Usage

Formal register, commonly used in academic, legal, and professional contexts. Often appears with the preposition "em" (fundamentar em = to base on). The reflexive form "fundamentar-se" (to be based on) is also very common.