unperturbable









unperturbable


verb (used with object)

  1. to disturb or disquiet greatly in mind; agitate.
  2. to throw into great disorder; derange.
  3. Astronomy. to cause perturbation in the orbit of (a celestial body).

verb (tr; often passive)

  1. to disturb the composure of; trouble
  2. to throw into disorder
  3. physics astronomy to cause (a planet, electron, etc) to undergo a perturbation

v.late 14c., from Old French perturber “disturb, confuse” (14c.) and directly from Latin perturbare “to confuse, disorder, disturb,” especially of states of the mind, from per- “through” (see per) + turbare “disturb, confuse,” from turba “turmoil, crowd” (see turbid). Related: Perturbed; perturbing.

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