tsach describes a strikingly bright or clear quality, applied to heat, wind, a beloved, and speech.

The attested uses chiefly describe a striking bright or vivid quality in comparisons involving heat, wind, and a beloved; one occurrence places the adjective in the clause about stammerers speaking clearly.

1. Striking brightness or vivid appearance · dominant

   In Isaiah 18:4, the masculine singular form occurs in the comparison to heat upon light; the APB renders the clause “like dazzling heat upon light.” In Jeremiah 4:11 it describes wind in the wilderness, and in Song of Songs 5:10 it stands in the beloved’s description, where the APB renders “My beloved is radiant and ruddy.”

   Isaiah 18:4Jeremiah 4:11Song of Songs 5:10
2. Clarity in speech · occasional

   In Isaiah 32:4, the feminine plural form occurs in the clause about the tongue of stammerers; the APB renders that they will “hasten to speak clearly.” This context supports a clear quality expressed in speech rather than a visible object.

   Isaiah 32:4

In the Anselm Project Bible: The APB uses “dazzling” for heat and wind, “radiant” for the beloved, and “clearly” in the clause about speech. These renderings confirm the verse contexts rather than establish exact English equivalents.