ETYM Old Eng. frenesie, fransey, French frénésie, Latin phrenesis, from Greek phrenesis for phrenitis disease of the mind, phrenitis, from phrhn mind. Related to Frantic, Phrenitis.
Any violent agitation of the mind approaching to distraction; violent and temporary derangement of the mental faculties; madness; rage.
Frightened, alarmed; filled with concern
1. Peur.
2. Terreur.