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Adjective: perturbing  pu(r)'tur-bing
  1. Causing distress, worry or anxiety
    "perturbing news"; "a revelation that was most perturbing";
    - distressing, distressful, disturbing, troubling, worrisome, worrying, concerning
Verb: perturb  pu(r)'turb
  1. Disturb in mind or make uneasy or cause to be worried or alarmed
    "She was rather perturbed by the news that her father was seriously ill";
    - unhinge, disquiet, trouble, cark, distract, disorder
  2. Disturb or interfere with the usual path of an electron or atom
    "The electrons were perturbed by the passing ion"
  3. Cause a celestial body to deviate from a theoretically regular orbital motion, especially as a result of interposed or extraordinary gravitational pull
    "The orbits of these stars were perturbed by the passings of a comet"
  4. Throw into great confusion or disorder
    "Fundamentalists threaten to perturb the social order";
    - derange, throw out of kilter

See also: heavy

Type of: deviate, disarray, disorder, disturb, trouble, upset

Encyclopedia: Perturb