perturb

== English == === Etymology === From Late Middle English perturben (“to disturb (someone) mentally, disquiet; to cause disorder to (something), confuse; to hinder (something)”), from Old French perturber, and from its etymon Latin perturbāre, the present active infinitive of perturbō (“to confuse; to alarm, disturb, trouble, perturb”), from per- (intensifying prefix) + turbō (“to agitate, disturb, unsettle, perturb; to upset”) (from turba (“disorder, disturbance, turmoil”) (possibly from Ancient Greek τῠ́ρβη (tŭ́rbē, “confusion, disorder, tumult”), either from Pre-Greek, or Proto-Indo-European *(s)twerH- (“to agitate, stir up; to urge on, propel”)) + -ō (suffix forming infinitives of regular first-conjugation verbs)). === Pronunciation === (Received Pronunciation) IPA(key): /pəˈtɜːb/ (General American) IPA(key): /pəɹˈtɜɹb/ Rhymes: -ɜː(ɹ)b Hyphenation: per‧turb === Verb === perturb (third-person singular simple present perturbs, present participle perturbing, simple past and past participle perturbed) (transitive) To cause (something) to be physically disordered or disturbed; to cause confusion. Synonyms: derange, disturb, unsettle; see also Thesaurus:confuse To disturb (someone, their mind, etc.) mentally; to bother, trouble, upset. Synonyms: agitate, distress, unsettle; see also Thesaurus:upset Antonyms: see Thesaurus:comfort (astronomy) Of a celestial body: to modify the motion or orbit of (another celestial body) by exerting a gravitational force; hence (physics), to slightly modify (the motion of an object). (mathematics) To slightly modify (a set of equations or their solutions), producing deviations from a simple, easily solvable problem, in order to find an approximate solution to a problem that is more difficult to solve or otherwise unsolvable. (sciences) To influence (a process or system) so that it deviates from its normal state. (intransitive) To bother, to disturb, to trouble. Synonym: agitate ==== Conjugation ==== ==== Derived terms ==== ==== Related terms ==== ==== Translations ==== === References === === Further reading === perturbation (astronomy) on Wikipedia.Wikipedia perturbation theory on Wikipedia.Wikipedia perturbation (disambiguation) on Wikipedia.Wikipedia William Dwight Whitney, Benjamin Eli Smith, editors (1895–1910), “perturb”, in The Century Dictionary and Cyclopedia: […], New York, N.Y.: The Century Co., →OCLC. “perturb”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC. “perturb”, in OneLook Dictionary Search. == Romanian == === Pronunciation === IPA(key): [perˈturb] === Verb === perturb first-person singular present indicative/subjunctive of perturba