convulse
From LSJ
v. trans.
Lit. and Met., P. and V. ταράσσειν, συνταράσσειν, σείειν, κινεῖν.
Met., P. and V. κυκᾶν (Plat. and Ar.), συγχεῖν, θράσσειν (Plat. but rare P.).
Be convulsed: P. and V. σφαδάζειν (Xen.), V. σπᾶσθαι.
Be convulsed with laughter: use v. laugh.