Sunt verba voces quibus hunc lenire dolorem possis, magnam morbi deponere partem → Words will avail the wretched mind to ease and much abate the dismal black disease.
Lit. and Met., P. and V. ταράσσειν, συνταράσσειν, σείειν, κινεῖν.
Met., P. and V. κυκᾶν (Plato and Ar.), συγχεῖν, θράσσειν (Plato but rare P.).
be convulsed: P. and V. σφαδάζειν (Xen.), V. σπᾶσθαι.
be convulsed with laughter: use v. laugh.