Merriam-Webster's Collegiate® Dictionary, 11th Edition
FRENZY
I. noun (plural frenzies)
Etymology: Middle English frenesie, from Middle French, from Medieval Latin phrenesia, alteration of Latin phrenesis, from phreneticus
Date: 14th century
1. a temporary madness, a violent mental or emotional agitation, intense usually wild and often disorderly compulsive or agitated activity ,
II. transitive verb (frenzied; frenzying)
Date: 1791
to affect with frenzy