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perturbative

[pur-ter-bey-tiv, per-tur-buh-tiv]
adjective
  1. having a tendency to perturb; disturbing.
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Origin of perturbative

From the Late Latin word perturbātīvus, dating back to 1630–40. See perturbation, -ive
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018