patronize

Short definition from Wiktionary

Verb

1. 1
   To act as a patron of; to defend, protect, or support.
2. 2
   To make oneself a customer of a business, especially a regular customer.
3. 3
   To assume a tone of unjustified superiority toward; to talk down to, to treat condescendingly.
4. 4
   To blame, to reproach.