זְכוּכִית
properly, transparency, i.e. glass
Definition
The Hebrew noun זְכוּכִית (zᵉkûwkîyth) refers to a transparent, glass-like substance. It is derived from a root meaning 'to be pure or clear,' emphasizing its quality of transparency. In its single biblical occurrence in Job 28:17, it is listed among precious, untarnishable treasures—gold, crystal (זְכוּכִית), and jewels—that cannot compare to the value of wisdom. The term likely denotes a highly refined, clear material, possibly a form of glass or crystal known in the ancient Near East.
Biblical Usage
This word is used only once in the Old Testament, in the poetic book of Job. It appears in Job 28:17 within a discourse on the inestimable value of wisdom, where it is paralleled with gold and precious stones as items of great worth that are nevertheless worthless in comparison to divine wisdom. Its usage is purely metaphorical, serving to elevate wisdom above the most prized and pure material possessions.
Etymology
זְכוּכִית is derived from the root זָכָה (zākâ, H2135), which means 'to be clean, pure, or clear.' This root is also associated with moral purity and innocence. The noun form specifically denotes a substance characterized by this purity and transparency, hence 'glass' or 'crystal.' Cognates in other Semitic languages, like Aramaic and Arabic, also relate to concepts of clarity and glass.
Semantic Range
Though used only once, זְכוּכִית carries theological weight in its context. In Job 28:17, it helps illustrate a profound contrast: even the most flawless, precious, and permanent human treasures—symbolized by pure gold and transparent crystal—are utterly inadequate to purchase or equal divine wisdom, which comes only from the fear of the Lord (Job 28:28). This underscores the transcendent, non-material value of God's wisdom, which surpasses all earthly commodities.
In the ancient Near East, transparent glass or crystal was a rare and highly valued luxury item, often associated with royalty and the divine. The technology for producing clear glass was limited and costly. Therefore, when Job mentions זְכוּכִית alongside gold, it signifies an object of extreme rarity and perfection, understood by the original audience as representing the pinnacle of human material achievement and beauty.
קֶרַח (qeraḥ, H7140) — 'ice' or 'crystal'; often used for frost or ice, but in Ezekiel 1:22 it describes a dazzling, crystalline expanse, sharing the concept of a clear, solid substance but with a different primary referent (ice/frost).
Word Details
How this works
Hebrew definitions are from Brown-Driver-Briggs (1906) and Strong's Exhaustive Concordance (1890), both public domain. BDB was groundbreaking for its era but reflects 19th-century assumptions about Semitic etymology. Modern scholarship (HALOT, DCH) has revised many entries. Use these definitions as a starting point for exploration, not as the final word on a term's meaning in context.
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