hellaciously

/hɛˈleɪʃəsli/
adverb
  1. In an extremely difficult, unpleasant, or intense manner.
    • She worked hellaciously to finish the project on time.
    • The wind blew hellaciously all night, rattling the windows.
    • The car's engine roared hellaciously as it climbed the steep hill.
  2. To a very great degree; extremely.
    • He was hellaciously fast in the race, breaking the record.
    • The prices at that store are hellaciously high.
    • The concert was hellaciously loud, but everyone loved it.
Antonyms
What does "hellaciously" mean? | whatsthatwordmean | whatsthatwordmean