(adv) to an exceedingly great extent or degree, Syn. immensely, Example:He had vastly overestimated his resources; was immensely more important to the project as a scientist than as an administrator
[きょうみしんしん, kyoumishinshin] (adj-no, adj-t, adv-to) very interesting; of absorbing interest; having a keen interest (in); being immensely curious (about)