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perturb

[per-turb] /pərˈtɜrb/
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).
Origin
1325-1375
1325-75; Middle English perturben (< Old French perturber) < Latin perturbāre to throw into confusion, equivalent to per- per- + turbāre to disturb; see turbid
Related forms
perturbable, adjective
perturbability, noun
perturbatious
[pur-ter-bey-shuh s] /ˌpɜr tərˈbeɪ ʃəs/ (Show IPA),
adjective
perturbedly
[per-tur-bid-lee] /pərˈtɜr bɪd li/ (Show IPA),
adverb
perturbedness, noun
perturber, perturbator
[pur-ter-bey-ter] /ˈpɜr tərˌbeɪ tər/ (Show IPA),
noun
perturbingly, adverb
perturbment, noun
nonperturbable, adjective
nonperturbing, adjective
unperturbable, adjective
unperturbed, adjective
unperturbing, adjective
Synonyms
1. trouble. 2. confuse, addle, muddle.
Antonyms
1. pacify.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for perturbed
  • But the fees perturbed publishers, several of which are still owed money.
  • It's also hard not to be perturbed by the whole affair.
  • Then suddenly the police pursuers pause in the hot chase, distracted and perturbed by new things in view.
  • My dad, perturbed, asked the fellow why he had bothered asking.
  • Today's bloggers aren't perturbed in the least by blogging's putative dangers.
  • The first-years, who were under the impression that they'd come to college to get an education, were understandably perturbed.
  • It's a big assignment, but he's not perturbed.
  • His persistence perturbed some college officials, who said that the department must be more patient.
  • He seems almost perturbed that people should find anything inconsistent.
  • The cloud was likely irregular in shape, perturbed by neighboring stars and other clouds.
British Dictionary definitions for perturbed

perturb

/pəˈtɜːb/
verb (transitive; 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
Derived Forms
perturbable, adjective
perturbably, adverb
perturbing, adjective
perturbingly, adverb
Word Origin
C14: from Old French pertourber, from Latin perturbāre to confuse, from per- (intensive) + turbāre to agitate, from turba confusion
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for perturbed
adj.

1510s, past participle adjective from perturb (v.).

perturb

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.

Online Etymology Dictionary, © 2010 Douglas Harper
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