convulsive
Concise Oxford English Dictionary © 2008 Oxford University Press:
convulse /kənˈvʌls/
▶verb suffer convulsions.
■ (of an emotion or physical stimulus) cause to make sudden, violent, uncontrollable movements.
– derivatives
convulsive adjective,
convulsively adverb.
convulsive adjective,
convulsively adverb.
– origin C17: from L. convuls-, convellere ‘pull violently, wrench’.
'convulsive' also found in these Oxford entries:

