a.shen describes something emitting smoke, whether a mountain or firebrand ends.

The attested uses describe visible smoke or smoldering: a smoking mountain in Exodus 20:18 and the smoking ends of firebrands in Isaiah 7:4.

1. Emitting smoke or smoldering · dominant

   In Exodus 20:18, the masculine singular form describes the mountain amid thunder, lightning, and trumpet sound; the APB renders the scene with “the mountain smoking.” In Isaiah 7:4, the masculine plural form describes the two ends of firebrands, which the APB renders as “two smoldering tails of firebrands.”

   Exodus 20:18Isaiah 7:4

In the Anselm Project Bible: The APB presents the singular occurrence as “the mountain smoking” in Exodus 20:18 and the plural occurrence as “two smoldering tails of firebrands” in Isaiah 7:4. These are clause-level renderings rather than definitions.