Definition of perturb in English:

perturb

Line breaks: per|turb
Pronunciation: /pəˈtəːb
 
/

verb

[with object]
1Make (someone) anxious or unsettled: they were perturbed by her capricious behaviour [with object and clause]: he was perturbed that his bleeper wouldn’t work
More example sentences
  • There are, probably, two principal concerns that will be perturbing the potential visitor.
  • She was not perturbed by the low attendance, insisting that most people on the street supported her position.
  • What perturbs me though is the complete lack of value I have received from my taxes, that I have faithfully paid towards public health over the years.
Synonyms
2Subject (a system, moving object, or process) to an influence tending to alter its normal or regular state or path: nuclear weapons could be used to perturb the orbit of an asteroid
More example sentences
  • Drugs perturb the system through increasing or decreasing transmission or transmitter levels, or up or down regulating receptor populations.
  • It could change the heating structure of the atmosphere and perturb the climate system in ways we don't understand now.
  • In this way, we see that the two systems engage in an exchange, a feedback loop of information and effect, which serves to further change or perturb each system.

Origin

late Middle English: from Old French pertourber, from Latin perturbare, from per- 'completely' + turbare 'disturb'.

Derivatives

perturbable

adjective

perturbative

Pronunciation: /pəˈtəːbətɪv, ˈpəːtəbeɪtɪv/
adjective
sense 2.
More example sentences
  • In the perturbative expansion of a gauge theory, large numbers of Feynman amplitudes combine to produce mathematically simple expressions.
  • His logic, however, would have deprecated the early remarkable successes of perturbative quantum electrodynamics.
  • Such measurements can then be compared with predictions of perturbative QCD, a relatively tractable corner of the full theory.

Definition of perturb in:

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Word of the day abjure
Pronunciation: əbˈdʒʊə
verb
solemnly renounce (a belief, cause, or claim)