intransitive verb.
To shake or agitate violently: synonym: agitate.
intransitive verb.
To disturb or upset severely.
intransitive verb.
To affect with irregular and involuntary muscular contractions; throw into convulsions.
intransitive verb.
To cause to shake with laughter or strong emotion.
intransitive verb.
To become affected by convulsions; shake.
intransitive verb.
To be disturbed or upset.
The Century Dictionary and Cyclopedia
To draw or contract spasmodically or involuntarily, as the muscular parts of an animal body; affect by irregular spasms: as, his whole frame was convulsed with agony.
To shake; disturb by violent irregular action; cause great or violent agitation in.
the GNU version of the Collaborative International Dictionary of English
transitive verb.
To contract violently and irregulary, as the muscular parts of an animal body; to shake with irregular spasms, as in excessive laughter, or in agony from grief or pain.
transitive verb.
To agitate greatly; to shake violently.