What is the significance of his stomach?
Ibn Ezra: This is a metaphor, like "Bitnecha Sa'achel u'Me'echa Semalei."
What are "Ovos"?
Rashi: They are flasks as tall as a person. Ibn Ezra - "Al Tifnu El ha'Ovos" - the craft of Ba'alei Ov is with 1 flasks.
I assume that the text should say b'Nodos. They speak via flasks to change their voice. (PF)
What is the comparison to wine that is not opened?
Rashi: My stomach desires to answer, like new wine in new flasks. The wine expands, and breaks the flasks.
Malbim: The Ru'ach that bubbles in wine and is held in it, it wants to leave. An old flask can hold it. If it is new, it cleaves. Also I am not used to holding in my words - they will break out!
