Adverb
in a very agitated manner; as if possessed by an evil spirit
Source: WordNetAt that time, the reigning aesthetic in electronic music was crisply digital, frenetically hyper-rhythmic, and futuristic. Source: Internet
What in the Hell is this for — ?” asked the Mayor, an almost imploring expression on his nonplussed face, while the cogs, wheels, springs, and electrical batteries spun frenetically. Source: Internet