1. 突然的;不能自控的;不由自主地
A convulsive movement or action is sudden and cannot be controlled.

1. affected by involuntary jerky muscular contractions
resembling a spasm

e.g. convulsive motions
his body made a spasmodic jerk
spastic movements

Synonym: spasmodicspastic

2. resembling a convulsion in being sudden and violent

e.g. a convulsive rage
convulsive laughter