Thy silver is become dross,.... Meaning either that such persons, who had the appearance of goodness, looked like genuine silver, were now become reprobate, and, as the wicked of the earth, like dross, Jer 6:30 or that the word of God, which is as silver purified seven times, was now corrupted with false glosses and human traditions, which were as dross:thy wine mixed with water ; the wine of the divine word, which was mixed and blended with the inventions of men, as before; so the roof of the church's mouth, which is no other than the ministry of the word, is compared to the best wine, So 7:9.
It being usual to mix water with wine, and drink it, and this being not at all reproachful, but commendable, Gussetius thinks such a version does not express the sense of the words; he therefore thinks that lhm is the same as llwhm contracted, which signified "infatuated"; and so the words should be rendered, "thy wine is infatuated into water"; is degenerated, and has lost its spirit and sprightliness, and is become insipid and tasteless.
So Jarchi mentions a Midrash, which interprets it by the same word in Ec 2:2. It is a word only used in this place. Joseph Kimchi says that in the Arabic, language has the signification of mixture, but without giving any instance.