ka.hah describes becoming dim, especially of eyes, and can also express not yielding to dimness.

The attested use chiefly concerns eyes becoming dim or failing, whether through age, vexation, or judgment. It also occurs in a statement that someone will not grow dim, while its precise contribution in the sword announcement of Ezekiel 21:12 is not isolated by the translation.

1. Eyes becoming dim or failing · dominant

   In Genesis 27:1 the Qal sequential imperfect occurs when Isaac's eyes have become dim so that he cannot see; the APB renders the clause "his eyes had become dim so that he could not see." Deuteronomy 34:7 contrasts Moses' undimmed eye with his death, Job 17:7 connects a dimmed eye with vexation, and Zechariah 11:17 pronounces that a right eye will "grow completely dim."

   Genesis 27:1Deuteronomy 34:7Job 17:7Zechariah 11:17
2. Dimming stated beyond an eye description · occasional

   In Isaiah 42:4 the Qal imperfect is negated in the declaration that "He will not grow dim" before justice is set in the land. Ezekiel 21:12 has a Piel sequential perfect amid the announcement that the sword has come upon the people and Israel's princes, but the APB does not make this token's particular contribution identifiable.

   Isaiah 42:4Ezekiel 21:12

In the Anselm Project Bible: The APB repeatedly presents the eye-related occurrences with "grown dim," "become dim," or "grow completely dim," and Isaiah 42:4 with "will not grow dim." In Ezekiel 21:12, the translation gives the sword announcement but does not visibly isolate a rendering for this token.