Synonyms Word Origin See more synonyms on Thesaurus.com 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). Origin of perturb 1325–75; Middle English perturben
Old French perturber
to throw into confusion, equivalent to
to disturb; see
turbid Related forms per·turb·a·ble, adjective per·turb·a·bil·i·ty, noun per·tur·ba·tious , [pur-ter- bey-sh uh s] /ˌpɜr tərˈbeɪ ʃəs/ adjective per·turb·ed·ly , [per- tur-bid-lee] /pərˈtɜr bɪd li/ adverb per·turb·ed·ness, noun per·turb·er, per·tur·ba·tor , [ pur-ter-bey-ter] /ˈpɜr tərˌbeɪ tər/ noun per·turb·ing·ly, adverb per·turb·ment, noun non·per·turb·a·ble, adjective non·per·turb·ing, adjective un·per·turb·a·ble, adjective un·per·turbed, adjective un·per·turb·ing, adjective
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for perturbable to disturb the composure of; trouble to throw into disorder 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
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Word Origin and History for perturbable 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