bombinate
to buzz or hum; to speak idly, vacuously, or to little effect.
None of this multitude of thinkers and their satellites brought his thoughts into really conclusive contact with the others. To do it would have been to discover much practical identity and so lose distinction. After their fashion, each bombinated abundantly with only the slightest regard to other bombinators.
Where it comes from
From Medieval Latin bombināre (“buzz, hum”), variant of Latin bombilō, from Ancient Greek βομβυλιάζειν (bombuliázein), from βόμβος (bómbos, “booming, humming”), of imitative origin.
Adapted from the Wiktionary entry bombinate (CC BY-SA 4.0).