spasm
//ˈspæzəm//
Noun
spasmSingular
spasmsPlural
1
A sudden, involuntary contraction of a muscle or group of muscles.
She felt a sudden spasm in her leg while running.
2
A sudden burst or spell of activity, emotion, or sensation.
She felt a sudden spasm of anger when she heard the news.
Synonym
Verb
1
To undergo or experience a spasm; to contract involuntarily.
His leg muscles spasmed after the long run.