establish
es-tab-lish
verb
To prove or show something to be true or certain with evidence.
"The evidence established his innocence."
verb
To create or set up something, like an organisation or system, firmly.
"They aim to establish a new charity."
Thesaurus
Synonyms: build, found, base, ground, shew, show, demonstrate, prove, launch, set up, make, lay down
Antonyms: abolish, confute, disprove, get rid of