συσπαράσσωsysparássō

to convulse completely: with accusative of person, Mark 9:20, Luke 9:42 (cf.

Greek (New Testament) · G4952

Meanings

σπαράσσω).

Same root

σύνsýn · G4862with or together (but much closer than G3326 (μετά) or G3844 (παρά)), i.e. by association, companionship, process, resemblance, possession, instrumentality, addition, etc.
σπαράσσωsparássō · G4682apparently strengthened from G4685 (σπάω) through the idea of spasmodic contraction); to mangle, i.e. convluse with epilepsy

Where it appears

Appears 2 times in the Bible.

Mark 9:20 So they brought the boy. But when the evil spirit saw Jesus, it threw the child into a violent convulsion, and he fell to the ground, writhing and foaming at the mouth.
Luke 9:42 As the boy came forward, the demon knocked him to the ground and threw him into a violent convulsion. But Jesus rebuked the evil spirit and healed the boy. Then he gave him back to his father.

Source: G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922), public domain.