Etymology

From bi- +‎ driogan.

Pronunciation

• IPA^(key): /ˈbɪˈdriːəɣɑn/
• Possibly IPA^(key): /ˈbɪˈdriːɔɣɑn/, but the spelling with ⟨io⟩ is rare, so that it is not certain whether it might be a mere writing convention copied from Old Dutch and Old High German.