What is the meaning of mortifying?

verb

• Practice self-denial of one's body and appetites.
  • synonyms: mortify
• Hold within limits and control.
  • usage: "subdue one's appetites"; "mortify the flesh"
  • synonyms: mortify, subdue, crucify
• Cause to feel shame; hurt the pride of.
  • usage: "He humiliated his colleague by criticising him in front of the boss"
  • synonyms: humiliate, mortify, chagrin, humble, abase
• Undergo necrosis.
  • usage: "the tissue around the wound necrosed"
  • synonyms: necrose, gangrene, mortify, sphacelate

adjective

• Causing to feel shame or chagrin or vexation.
  • usage: "the embarrassing moment when she found her petticoat down around her ankles"; "it was mortifying to know he had heard every word"
  • synonyms: embarrassing
• Causing awareness of your shortcomings.
  • usage: "golf is a humbling game"
  • synonyms: demeaning, humbling, humiliating