verily

/ˈvɛrəli/
adverb
  1. Truly; certainly; used to emphasize the truth of a statement (often in old or formal English).
    • Verily, I say unto you, this is a great discovery.
    • The old manuscript began, 'Verily, the kingdom was in turmoil.'
    • He verily believed that hard work would lead to success.
Antonyms
What does "verily" mean? | whatsthatwordmean | whatsthatwordmean