Synonyms Examples Word Origin See more synonyms for perturb 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 uhs] /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
Related Words for unperturbable possessed
unflappable Examples from the Web for unperturbable Historical Examples of unperturbable
But what “swiftness” there is about the
unperturbable and mighty sea, I am at a loss to recognise.
He refolds it and lays it in his desk with a countenance as
unperturbable as death. British Dictionary definitions for unperturbable 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 for perturb
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
Word Origin and History for unperturbable 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