Adam Clarke on Job 15:2

Should a wise man utter vain knowledge - Or rather, Should a wise man utter the science of wind? A science without solidity or certainty.

And fill his belly with the east wind? - בטן beten, which we translate belly, is used to signify any part of the cavity of the body, whether the region of the thorax or abdomen; here it evidently refers to the lungs, and may include the cheeks and fauces. The east wind, קדים kadim, is a very stormy wind in the Levant, or the eastern part of the Mediterranean Sea, supposed to be the same with that called by the Greeks ευροκλυδων, euroclydon, the east storm, mentioned Act 27:14. Eliphaz, by these words, seems to intimate that Job's speech was a perfect storm or tempest of words.