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convulse [convulsed, convulsing, convulses]▼(to violently shake)verb[UK: kən.ˈvʌls] [US: kən.ˈvʌls]
judder▼(to spasm or shake violently)verb[UK: ˈdʒʌ.də(r)] [US: ˈdʒʌ.dər]
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