patronize
v.v. to visit a business or shop regularly to support it. It can also mean to treat someone in a way that shows you think they are less important than you are.
v. to frequent a commercial establishment as a regular customer; alternatively, to treat someone with condescending or superior indifference. Often carries a negative nuance when describing social interactions.
I try to patronize local businesses instead of big chains.
The local bakery thrives because the neighborhood residents choose to patronize it rather than the national supermarket.
While the wealthy elite often patronize the arts, their condescending attitude toward the working class can sometimes undermine the very cultural institutions they claim to support.
From patron + -ize (verb ending); or from Old French patroniser, from Medieval Latin patronizāre (“to lead a galley as patron”). Piecewise doublet of patternize.