"convulses" in the verb sense
1. convulse
make someone convulse with laughter
"The comedian convulsed the crowd"
2. convulse
be overcome with laughter
3. convulse, thresh, thresh about, thrash, thrash about, slash, toss, jactitate
move or stir about violently
"The feverish patient thrashed around in his bed"
4. convulse
shake uncontrollably
"earthquakes convulsed the countryside"
5. convulse
cause to contract
"The spasm convulses her facial muscles"
6. convulse
contract involuntarily, as in a spasm
"The muscles in her face convulsed"
Source: WordNet® (An amazing lexical database of English)
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