BRUTALLY
viciously, brutally, savagely
(adverb) in a vicious manner; “he was viciously attacked”
Source: WordNet® 3.1
Etymology
Adverb
brutally (comparative more brutally, superlative most brutally)
In a brutal manner; viciously, barbarically.
Source: Wiktionary
Bru"tal*ly, adv.
Definition: In a brutal manner; cruelly.
BRUTAL
Bru"tal, a. Etym: [Cf. F. brutal. See Brute, a.]
1. Of or pertaining to a brute; as, brutal nature. "Above the rest of
brutal kind." Milton.
2. Like a brute; savage; cruel; inhuman; brutish; unfeeling;
merciless; gross; as, brutal manners. "Brutal intemperance."
Macaulay.
Source: Webster’s Unabridged Dictionary 1913 Edition