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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 of perturb
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. 2015.
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Examples from the Web for perturbed
Contemporary Examples
Historical Examples
  • The boy greeted his old friends with eager delight, not noticing for the moment their anxious faces and perturbed demeanor.

    Aunt Jane's Nieces Abroad Edith Van Dyne
  • By degrees the placid influence of her friend calmed her perturbed spirit.

    Philothea Lydia Maria Child
  • Nor was he perturbed when later the machine stopped on the verge of the broad pavement leading to steps beyond.

    The Higher Court Mary Stewart Daggett
  • Chip whispered the question in the ear of the perturbed Little Doctor.

    Chip, of the Flying U B. M. Bower
  • This was sufficient to show that he was in a perturbed frame of mind.

    Dodo, Volumes 1 and 2 Edward Frederic Benson
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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