condescend

Verb

• treat condescendingly

• debase oneself morally, act in an undignified, unworthy, or dishonorable way
  • I won't stoop to reading other people's mail
    

• do something that one considers to be below one's dignity

• behave in a patronizing and condescending manner

Related words

• Synonyms: 
  patronize , patronise , stoop , lower oneself , deign , descend