HELLISHLY

infernally, hellishly

(adverb) extremely; “infernally clever”; “hellishly dangerous”

Source: WordNet® 3.1

Etymology

Adverb

hellishly (comparative more hellishly, superlative most hellishly)

In a hellish manner.

Source: Wiktionary

HELLISH

Hell"ish, a.

Definition: Of or pertaining to hell; like hell; infernal; malignant; wicked; detestable; diabolical. "Hellish hate." Milton.

– Hell"ish*ly, adv.

– Hell"ish*ness, n.

Source: Webster’s Unabridged Dictionary 1913 Edition