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disturbance, perturbation | activity that is a malfunction, intrusion, or interruption | |
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disturbance, perturbation, upset | an unhappy and worried mental state | |
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perturbation, fluster | a disposition that is confused or nervous and upset | |
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perturbation | [in physics] a secondary influence on a system that causes it to deviate slightly | |
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disruption, perturbation | the act of causing disorder |