akh.zav describes what proves unreliable or misleading, pictured in a failing brook and applied to houses in Micah.

The two occurrences portray something unreliable or misleading: Jeremiah 15:18 compares it to waters that fail, while Micah 1:14 applies it within the statement about the houses of Achzib.

1. Unreliable or misleading · dominant

   In Jeremiah 15:18, the masculine singular absolute adjective occurs in the comparison with a brook and waters; the APB renders the clause “like a deceitful brook, like waters that fail.” In Micah 1:14, the same form occurs in the statement about the houses of Achzib; the APB renders them “as something deceptive to the kings of Israel.”

   Jeremiah 15:18Micah 1:14

In the Anselm Project Bible: The APB presents the term through “a deceitful brook” and “something deceptive.” These phrases show the verses’ presentation rather than establish separate lexical senses.