This is the 945th most frequent Hungarian word.
bizony
Surely; indeed; certainly.
Here, "bizony" is used to express agreement or confirmation, similar to saying "indeed" in English.
Bizony, igazad van.
Indeed, you are right.
In this sentence, "bizony" emphasizes the fact being stated, adding a tone of agreement to the difficulty of the task.
Bizony nem könnyű feladat ez.
Indeed, this is not an easy task.
In this context, "bizony" appears embedded in the compound word "megbizonyosodtunk," demonstrating its root "biz-" which relates to 'certainty.'