ya.aph describes being worn down or becoming exhausted, whether through labor, lack of strength, or sustained effort.

The occurrences consistently describe exhaustion or the loss of strength: people and nations become worn down through labor, youths may fail, an ironsmith lacks strength, and the term can also characterize persons already exhausted. The same usage appears in negated or promised contexts, where the APB says God does not become weary and those who wait for the LORD will not faint.

1. Exhaustion or becoming worn down · dominant

   In Isaiah 40:30, the Qal imperfect plural form occurs in the clause that the APB renders, “Even youths faint and grow weary,” while Isaiah 44:12 places the sequential imperfect singular after the ironsmith has labored and lacks strength. Isaiah 40:28 and Isaiah 40:31 use Qal imperfect forms in contrasting statements: God does not become weary, and those who wait for the LORD will walk without fainting. The adjective in Judges 8:15 describes men for whom bread was sought, and the passive participle in Daniel 9:21 describes Gabriel as “faint with weariness.”

   Isaiah 40:30Isaiah 44:12Isaiah 40:28Isaiah 40:31Judges 8:15Daniel 9:21

In the Anselm Project Bible: The APB presents the relevant clauses with wording such as “faint,” “becomes faint,” “grow weary,” “weary themselves,” and “exhausted.” This variation does not establish separate meanings for the lemma.