Convulse meaning

kən-vŭls'
To shake or agitate violently.

Tremors that convulsed the countryside.

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To disturb or upset severely.

Strikes and riots convulsed the nation.

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To affect with irregular and involuntary muscular contractions; throw into convulsions.
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To cause to shake with laughter or strong emotion.
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To become affected by convulsions; shake.
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To be disturbed or upset.

The region convulses with change.

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To shake or disturb violently; agitate.
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To cause convulsions, or spasms, in.
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To cause to shake as with laughter, rage, or grief.
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To affect with or become affected by irregular and involuntary muscular contractions.
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To violently shake or agitate.
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To create great laughter.
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Origin of convulse

For spelling, the -e (on -lse) is so the end is pronounced /ls/, rather than /lz/ as in gulls, and does not change the vowel (‘u’). Compare else, false, pulse.