Sample Sentences for
perturb
(editor-reviewed)

perturb as in:  she was perturbed

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    His expression was perturbed and preoccupied.  (source)
    perturbed = disturbed or uneasy
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    Hagrid didn't seem perturbed by Ron's slug problem, which Harry hastily explained as he lowered Ron into a chair.  (source)
    perturbed = disturbed or made uneasy
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    ...Margot asked, somewhat perturbed.  (source)
    perturbed = disturbed
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    ...but most of the company backed away, even more perturbed than before.  (source)
    perturbed = disturbed or made uneasy
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    "Well now, that is a shame," agreed Hannah, unperturbed.  (source)
    unperturbed = undisturbed
    standard prefix: The prefix "un-" in unperturbed means not and reverses the meaning of perturbed. This is the same pattern you see in words like unhappy, unknown, and unlucky.
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    Matthew was smoking—a sure sign of perturbation of mind.  (source)
    perturbation = disturbance of mind
    standard suffix: The suffix "-tion", converts a verb into a noun that denotes the action or result of the verb. Typically, there is a slight change in the ending of the root verb, as in action, education, and observation.
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    The news didn't perturb him as much as excite his curiosity.†  (source)
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    We don't want them perturbing the material.†  (source)
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    The lieutenant is a respectable fellow, but his is a simple temperament, not prone to spiritual dangers—the sort that never perturbs a teacher.†  (source)
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    14 Now while I sat in the day and look'd forth, In the close of the day with its light and the fields of spring, and the farmers preparing their crops, In the large unconscious scenery of my land with its lakes and forests, In the heavenly aerial beauty, (after the perturb'd winds and the storms,) Under the arching heavens of the afternoon swift passing, and the voices of children and women, The many-moving sea-tides, and I saw the ships how they sail'd, And the summer approaching with richness, and the fields all busy with labor, And the infinite separate houses, how they all went on, each with its meals and minutia of daily usages, And the streets how their throb†  (source)
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    [Barbara turns away sadly and stands near her mother, listening perturbedly]†  (source)
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    He refolds it and lays it in his desk with a countenance as unperturbable as death.†  (source)
    standard prefix: The prefix "un-" in unperturbable means not and reverses the meaning of perturbable. This is the same pattern you see in words like unhappy, unknown, and unlucky.
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    Her husband and his family were already becoming highly critical of such a woman and were not unduly perturbed when they found she had fled to join the Christians.  (source)
    perturbed = disturbed
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meaning too rare to warrant focus

•
The planet, Neptune, was discovered after its existence was predicted by perturbations in Uranus' orbit.
perturbations = secondary influences on a system that cause it to deviate slightly
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    We will study the evolution of perturbations over time to find out if the configuration is stable.
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    If the perturbations are small, the procedure should work.
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    Tiny perturbations can be endlessly amplified.  (source)
    perturbations = secondary influences
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    Then you looked for perturbations that might indicate other planets.  (source)
    perturbations = deviations caused by secondary influences
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    Adding the correction factor for perturbation from space-time curvature to the classical equations would yield the right mathematical model.  (source)
    perturbation = secondary influence
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    Under the influence of their mutually perturbing gravitational attraction, their movements are unpredictable—the three-body problem.  (source)
    perturbing = causing secondary influences
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    She had no gift for small perturbations, mean-spirited resentments, concealed envies, works of charity, faded endearments, ordinary friendly politeness, or day-to-day acts of kindness.†  (source)
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    from study and perturbation of the brain  (source)
    perturbation = disturbance (of the mind)
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    Thou wilt die soon and thou are not yet simple nor free from perturbations, nor without suspicion of being hurt by external things, nor kindly disposed towards all; nor dost thou yet place wisdom only in acting justly.†  (source)
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    A great perturbation in nature,—to receive at once the benefit of sleep, and do the effects of watching—  (source)
    perturbation = deviation (from the natural course of things)
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    Also, there were comings and goings, and the erstwhile placid atmosphere of the cabin was vexed with strange perturbations and unrest.†  (source)
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    That having left all, he leave himself, and go wholly out of himself, and retain nothing of self-love....I have often said unto thee, and now again I say the same, Forsake thyself, resign thyself, and thou shalt enjoy much inward peace....Then shall all vain imaginations, evil perturbations, and superfluous cares fly away; then shall immoderate fear leave thee, and inordinate love shall die.†  (source)
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    The Major thought he recognized the piano, though, with the picture over it, as it used to be in former days, and his perturbations were renewed.†  (source)
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