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perturb

[ per-turb ]
/ pərˈtɜrb /
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See synonyms for: perturb / perturbed / perturbing / perturbable on Thesaurus.com

verb (used with object)

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

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Origin of perturb

First recorded in 1325–75; Middle English perturben (from Old French perturber ), from Latin perturbāre “to throw into confusion,” equivalent to per- per- + turbāre “to disturb”; see turbid
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for perturb

perturb
/ (pəˈtɜːb) /

verb (tr; often passive)

to disturb the composure of; trouble
to throw into disorder
physics astronomy to cause (a planet, electron, etc) to undergo a perturbation
perturbable, adjectiveperturbably, adverbperturbing, adjectiveperturbingly, adverb
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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