Third-person singular simple present indicative form of spasm.(verb)
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Use "spasms" in a sentence
"It had during its continuance brought on breathlessness on exertion, and what she called spasms or "grippings at the heart," no doubt the basis of her uneasy feelings in left hypochondrium."
"A volcanic eruption and a tsunami killed scores of people hundreds of miles apart in Indonesia - spasms from the Pacific "Ring of Fire," which spawns disasters from deep within the Earth."
"You can be in spasms and the doctors can't tell you why."