What does convulsive mean?
Convulsive is an adjective describing something marked by sudden, violent, involuntary contractions or spasms. In its primary, medical sense it applies to the body — a convulsive seizure, convulsive twitching of a limb — but it extends naturally to emotional outbursts, as in convulsive laughter or convulsive sobbing, where the reaction is as uncontainable as a muscle spasm. The word derives ultimately from the Latin verb convellere, "to tear violently loose," via convulsio, the term for a pulling or shaking fit, and it entered English in the early seventeenth century. Because its root idea is forceful, jerky disturbance, convulsive is also used figuratively for anything happening in abrupt shocks rather than smoothly — a convulsive economic change, for instance. It sits in a formal-to-literary register, carrying connotations of distress, urgency, or overwhelming force, and should not be confused with "compulsive," which concerns urges rather than spasms. Related forms include the verb "convulse" and the noun "convulsion."
adjectiveRelating to or characterized by sudden, violent, involuntary contractions or spasms of the muscles; more broadly, marked by abrupt, uncontrolled and often agitated movement or emotion.
- (Of movement or the body) involving or produced by involuntary, violent muscular contractions, as in a seizure or spasm.
- (Of emotion or reaction) sudden, violent and uncontrolled, as in convulsive laughter or convulsive sobbing.
- (Extended use) occurring in abrupt, jerky bursts rather than smoothly or gradually.
"The patient's convulsive trembling gradually subsided as the medication took effect."
"The fish gave a few convulsive flips before lying still on the deck."
"She was seized by convulsive laughter that she could not suppress."
From a Latin verb meaning "to tear loose," convulsive has been describing the body's most uncontrollable moments — seizures, sobbing, even laughter — since the seventeenth century.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of convulsive
Convulsive comes from the Latin verb convellere, meaning to pull or tear violently away, whose past participle gave rise to convulsio, used by Latin writers for a violent shaking fit. The word reached English through post-classical and medical Latin, appearing in English texts in the early seventeenth century alongside its sibling noun "convulsion." Its Latin cousins include "evulsion" and "avulsion," both denoting forcible tearing away, especially in surgical contexts.
Related word forms
How convulsive is actually used
Convulsive is a somewhat formal or clinical word in its medical sense, but it appears freely in literary and everyday writing when describing intense physical or emotional reactions. It carries strongly negative or dramatic connotations of loss of control, so it is rarely used of calm or graceful motion.
Easily confused with convulsive
"Compulsive" describes an irresistible urge to do something, while "convulsive" describes violent, involuntary muscular spasms or jerky, uncontrolled movement.