What is the meaning of vex?

verb

• Cause annoyance in; disturb, especially by minor irritations.
  • usage: "Mosquitoes buzzing in my ear really bothers me"; "It irritates me that she never closes the door after she leaves"
  • synonyms: annoy, rag, get to, bother, get at, irritate, rile, nark, nettle, gravel, chafe, devil
• Disturb the peace of mind of; afflict with mental agitation or distress.
  • usage: "I cannot sleep-my daughter's health is worrying me"
  • synonyms: worry
• Change the arrangement or position of.
  • synonyms: agitate, disturb, commove, shake up, stir up, raise up
• Subject to prolonged examination, discussion, or deliberation.
  • usage: "vex the subject of the death penalty"
• Be a mystery or bewildering to.
  • usage: "This beats me"; "Got me-I don't know the answer"; "a vexing problem"; "This question really stuck me"
  • synonyms: perplex, stick, get, puzzle, mystify, baffle, beat, pose, bewilder, flummox, stupefy, nonplus, gravel, amaze, dumbfound