DEMONIACALLY
demoniacally, frenetically
(adverb) in a very agitated manner; as if possessed by an evil spirit
Source: WordNet® 3.1
Etymology
Adverb
demoniacally (comparative more demoniacally, superlative most demoniacally)
In a demoniacal manner
Source: Wiktionary
Dem`o*ni"a*cal*ly, adv.
Definition: In a demoniacal manner.
DEMONIACAL
De*mo"ni*ac, Dem`o*ni"a*cal, a. Etym: [L. daemoniacus, fr. daemon;
cf. F. démoniaque. See Demon.]
1. Pertaining to, or characteristic of, a demon or evil spirit;
devilish; as, a demoniac being; demoniacal practices.
Sarcastic, demoniacal laughter. Thackeray.
2. Influenced or produced by a demon or evil spirit; as, demoniac or
demoniacal power. "Demoniac frenzy." Milton.
Source: Webster’s Unabridged Dictionary 1913 Edition