Definitions

1. verb

to support or maintain something, especially a theory or an argument

“The new data allowed researchers to sustentate their claims about the environmental impact of the new policy.”

2. verb (transitive)

to provide with support or maintenance, especially financial

“The university will sustentate the graduate student’s research project for the next two years.”

3. noun

a supporter or maintainer, especially of a theory or an argument

“The expert was hailed as a key sustentate of the new theory in the scientific community.”