am.mah denotes the structural bases of thresholds, shown shaking in Isaiah 6:4.

The attested use identifies the structural bases associated with thresholds: in Isaiah 6:4 they shake at the voice of the one calling.

1. Structural bases of thresholds · dominant

   In Isaiah 6:4, the plural construct form occurs in the phrase concerning the thresholds, which shake at the voice of the one calling. The APB renders the clause, “The foundations of the thresholds shook.”

   Isaiah 6:4

In the Anselm Project Bible: In Isaiah 6:4, the APB presents the phrase as “The foundations of the thresholds.” This rendering confirms the clause's structural setting rather than isolating the term independently.