dav.va describes a heart portrayed as weakened amid sickness, grief, or many sighings.

Across the three verses, the adjective describes a heart in a weakened condition: set alongside sickness in Isaiah 1:5 and expressed amid grief or many sighings in Jeremiah 8:18 and Lamentations 1:22.

1. A weakened heart amid affliction · dominant

   In Isaiah 1:5, the masculine singular absolute form occurs in the clause pairing every head with sickness and every heart with the condition at issue. In Jeremiah 8:18 and Lamentations 1:22, the same form describes the speaker's heart amid grief and many sighings; the APB renders these clauses with “my heart is faint.”

   Isaiah 1:5Jeremiah 8:18Lamentations 1:22

In the Anselm Project Bible: The APB presents the condition as “faint” in the heart clauses of all three verses. This rendering confirms the clauses' overall presentation rather than isolating the term independently.