זֶפֶת
asphalt (from its tendency to soften in the sun)
Definition
Zepheth refers to a sticky, black, tar-like substance known as asphalt or bitumen. In the biblical world, it was a naturally occurring petroleum product used primarily as a waterproof sealant. Its key characteristic, noted even in its etymology, is its tendency to soften or liquefy when heated by the sun. This property is directly referenced in its two biblical appearances: it waterproofs the basket holding the infant Moses (Exodus 2:3) and symbolizes the perpetual, burning judgment upon Edom (Isaiah 34:9).
Biblical Usage
This word is used only twice in the Old Testament, in two very different contexts. In Exodus 2:3, it is used practically as a waterproofing agent for Moses's basket, a detail highlighting his mother's care and God's providential protection. In Isaiah 34:9, it is used metaphorically within a prophetic oracle of judgment, where the land of Edom is said to be turned into burning pitch, symbolizing utter and perpetual desolation.
Etymology
Derived from an unused Hebrew root meaning 'to liquify' or 'to melt,' which perfectly describes the substance's behavior when heated. This connects to cognates in other Semitic languages, like Akkadian 'ṣapattu,' also referring to bitumen. The name directly reflects its most observable physical property.
Semantic Range
While a mundane substance, its two uses create a powerful theological contrast. In Exodus, it is an instrument of preservation and hidden salvation for the future deliverer. In Isaiah, it becomes a symbol of irreversible divine judgment and curse. This juxtaposition enriches reading by showing how God can use ordinary materials for both profound mercy and holy justice.
In the ancient Near East, asphalt was a vital natural resource, commonly gathered from surface seepages like those near the Dead Sea. It was used extensively in construction (as mortar) and waterproofing for boats, baskets, and irrigation canals. Its flammable nature and association with desolate, burning landscapes (like the Dead Sea region) made it a fitting image for prophetic judgments of fire and barrenness.
כֹּפֶר (kopher, H3724) — 'pitch' or 'bitumen'; often used interchangeably for waterproofing, but kopher can also mean 'ransom price'. חֵמָר (chemar, H2564) — 'bitumen' or 'slime'; used in Genesis 11:3 and 14:10 for the mortar of Babel and the tar pits of Siddim.
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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