Here the abstract noun "boldness" refers to the way in which Peter and John responded to the Jewish leaders, and can be translated with an adverb or an adjective. Alternate translation: "how boldly Peter and John had spoken" or "how bold Peter and John were" (See: [[rc://en/ta/man/translate/figs-explicit]] and [[rc://en/ta/man/translate/figs-abstractnouns]])
The words "ordinary" and "uneducated" share similar meanings. They emphasize that Peter and John had received no formal training in Jewish law. (See: [[rc://en/ta/man/translate/figs-doublet]])