convulse
verb
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to be overcome with laughter“I was convulsing during the comedian's set.”
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to make someone convulse with laughter“The comedian convulsed the crowd”
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to contract involuntarily, as in a spasm“Upon hearing the bad news the muscles in their face convulsed violently.”
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to cause to contract“The spasm convulses the facial muscles.”
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to shake uncontrollably“earthquakes convulsed the countryside”
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to move or stir about violentlytoss