Which word means to prove or give substantial form to something?

The term "substantiate" specifically refers to the act of providing evidence to support a claim or assertion, thus giving it a solid foundation or form. In legal and procedural contexts, to substantiate something often involves presenting proof or validation that establishes the truth of a statement or supports an argument. This term is frequently used in discussions around evidence and verification, highlighting its importance in ensuring claims are backed by factual information.

While "establish" might seem similar, it generally refers to the action of setting up or confirming the existence of something without necessarily implying the provision of proof. "Invalidate" conversely is about disproving or rendering something null and void, which is the opposite of what substantiate entails. Finally, "implement" focuses on putting a plan into action rather than providing proof or form to a concept or idea. This distinction underscores why "substantiate" is the most precise choice in this context.