What is the meaning of upsetting?

verb

• Disturb the balance or stability of.
  • usage: "The hostile talks upset the peaceful relations between the two countries"
  • synonyms: upset
• Cause to lose one's composure.
  • synonyms: upset, discompose, untune, disconcert, discomfit
• Move deeply.
  • usage: "This book upset me"; "A troubling thought"
  • synonyms: disturb, upset, trouble
• Cause to overturn from an upright or normal position.
  • usage: "The cat knocked over the flower vase"; "the clumsy customer turned over the vase"; "he tumped over his beer"
  • synonyms: overturn, tip over, turn over, upset, knock over, bowl over, tump over
• Form metals with a swage.
  • synonyms: swage, upset
• Defeat suddenly and unexpectedly.
  • usage: "The foreign team upset the local team"
  • synonyms: upset

adjective

• Causing an emotional disturbance.
  • usage: "his disconcerting habit of greeting friends ferociously and strangers charmingly- Herb Caen; "an upsetting experience"
  • synonyms: disconcerting