Definition of forsooth in English:

forsooth

adverb

humorous, archaic
  • sentence adverb Indeed (often used ironically)

    ‘it's a kind of wine bar for royals, forsooth’
    • ‘‘Ah, forsooth, and is it your worship indeed?‘cried the good dame.’
    definitely, certainly, unquestionably, undoubtedly, positively, without doubt, without a doubt, beyond any doubt, beyond doubt, beyond question, unmistakably, indubitably, undeniably, beyond the shadow of a doubt, surely, assuredly
    View synonyms

Origin

Old English forsōth (see for, sooth).

Pronunciation

forsooth

/fəˈsuːθ/