convulse

con·vulse

verb \kən-ˈvəls\

con·vulsedcon·vuls·ing

Definition of CONVULSE

transitive verb

: to shake or agitate violently; especially : to shake or cause to shake with or as if with irregular spasms <was convulsed with pain>

intransitive verb

: to become affected with convulsions <some children will inevitably convulse when fever reaches a high point—H. R. Litchfield & L. H. Dembo>