nefariously

Adverb

Meaning

in a nefarious manner or to a nefarious degree

Source: WordNet

poorly badly grossly horribly miserably foully wickedly flagrantly monstrously terribly hideously atrociously abominably basely evilly

Show all synonyms

fairly justly eminently honorably nobly worthily

Show all antonyms

nefariously involved in a conspiracy Source: Internet