DRASTICALLY
drastically
(adverb) in a drastic manner
Source: WordNet® 3.1
Etymology
Adverb
drastically (comparative more drastically, superlative most drastically)
To a drastic degree.
In a drastic manner.
Source: Wiktionary
DRASTIC
Dras"tic, a. Etym: [Gr. drastique. See Drama.] (Med.)
Definition: Acting rapidly and violently; efficacious; powerful; -- opposed
to bland; as, drastic purgatives.
– n. (Med.)
Definition: A violent purgative. See Cathartic.
Source: Webster’s Unabridged Dictionary 1913 Edition