IMMENSELY
vastly, immensely
(adverb) to an exceedingly great extent or degree; “He had vastly overestimated his resources”; “was immensely more important to the project as a scientist than as an administrator”
Source: WordNet® 3.1
Etymology
Adverb
immensely (comparative more immensely, superlative most immensely)
Greatly; hugely; extremely; vastly; to a great extent.
Source: Wiktionary
Im*mense"ly, adv.
Definition: In immense manner or degree.
IMMENSE
Im*mense", a. Etym: [L. immensus; pref. im- not + mensus, p. p. of
metiri to measure: cf. F. immense. See Measure.]
Definition: Immeasurable; unlimited. In commonest use: Very great; vast;
huge. "Immense the power" Pope. "Immense and boundless ocean."
Daniel.
O Goodness infinite! Goodness immense! Milton.
Syn.
– Infinite; immeasurable; illimitable; unbounded; unlimited;
interminable; vast; prodigious; enormous; monstrous. See Enormous.
Source: Webster’s Unabridged Dictionary 1913 Edition