noun

spasm

spasm, convulsion, cramp

He felt a sudden spasm in his back.

He felt a sudden spasm in his back.

She had a spasm of coughing.

She had a spasm of coughing.

The country experienced a spasm of violence.

The country experienced a spasm of violence.

((a)) spasm ((in a body part)) a sudden muscle contraction I felt a spasm in my leg.

((a)) spasm ((of sth.)) a sudden burst of activity or feeling He had a spasm of anger.

Synonyms: cramp, convulsion, twitch, seizure

From Greek 'spasmos', from 'span' meaning 'to draw, pull'. A pulling or drawing of the muscles.

It sounds a bit like 'snap' or 'zap', like a sudden, sharp muscle contraction.

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