| perturbation | | |
| disturbance, perturbation, upset | (n.) | an unhappy and worried mental state.; "there was too much anger and disturbance"; "she didn't realize the upset she caused me" |
| perturbation | (n.) | (physics) a secondary influence on a system that causes it to deviate slightly. |
| disturbance, perturbation | (n.) | activity that is a malfunction, intrusion, or interruption.; "the term `distress' connotes some degree of perturbation and emotional upset"; "he looked around for the source of the disturbance"; "there was a disturbance of neural function" |
| fluster, perturbation | (n.) | a disposition that is confused or nervous and upset. |
| disruption, perturbation | (n.) | the act of causing disorder. |
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