The word elitize
is more technical.
You should read:
(arte, ensino) = to make elitist
One of our commitments is that we should be helping to make
art more accessible and less elitist
Times, Sunday Times (2008)
But none of it was intellectually exclusive or elitist
Times, Sunday Times (2015)
(1) Collins Online Dictionary.
(2) KRISTINSOON, Axel. Expansions: Competition and Conquest in Europe Since the Bronze Age
(3) PAUPP, Terrence E. Redefining Human Rights in the Struggle for Peace and Development
. Cambridge University Press. 2014.
(4) STARR, Kevin. Coast of Dreams - California on the Edge 1990-2003
. Random House. 2004.