StrongerBible

kur

כּוּר

HebrewH3564furnace, smelting furnace

Appears 9 times · tap a cell to see the verses

Deu 4:201Ki 8:51Pro 17:3Pro 27:21Isa 48:10Jer 11:4Ezk 22:18Ezk 22:20Ezk 22:22
Root family
Names & words formed with this
Word studyKOORnoun

What kur means

a smelting furnace: the metalworker's fire that melts metal down so the pure part can be separated from the waste

TranslatabilityApproximateCertaintySettled

This is not a furnace in the modern sense of a machine that heats a building. It is the metalworker's fire, built hot enough to turn solid metal into liquid, so that the useless material can be lifted off and what remains is pure. All nine places the word appears trade on that single picture.

Because such a fire both destroys and improves, the biblical writers run the image in more than one direction:

  • In the proverbs it is a plain fact about how testing works, and the point of the comparison is that the LORD tests hearts the way fire tests gold.
  • In Ezekiel the picture turns dark, because Jerusalem itself becomes the furnace and its people the scrap metal about to be melted down in God's anger.
  • In Isaiah the furnace is the hardship God's people lived through, and they come out of it refined rather than ruined.

Three passages give the word its most famous use, calling Egypt an "iron furnace" that Israel was brought out of. Iron demands the fiercest heat of any metal the biblical writers worked with, so the phrase is a way of saying that no slavery burned hotter. Readers have long differed over how far to press it: whether Egypt was meant to purify Israel the way a furnace purifies metal, or whether the image simply measures how brutal those years were.

Several Hebrew words sit close to this one and should not be blurred together: the household oven for baking bread (תַּנּוּר), the kiln known for the thick smoke it throws up (כִּבְשָׁן), and the small crucible (מַצְרֵף) that stands beside this word in Proverbs, where the crucible takes the silver and the furnace takes the gold.

Nuances

1athe metalworker's furnace itself: a fire hot enough to melt metal down so the pure part separates from the waste
Pro 17:3Pro 27:21Ezk 22:18Ezk 22:20Ezk 22:22
1bthe furnace as an image of suffering that purifies the people who pass through it
Isa 48:10
1cin the phrase "iron furnace": Egypt, the place of crushing slavery that Israel was brought out of
TranslatabilityPartial
Deu 4:201Ki 8:51Jer 11:4

What scholars say about kur

The standard lexica are unanimous that this noun denotes the smelting furnace or crucible in which metal is liquefied and refined (BDB; HALOT; DCH), and it is regularly derived from a root meaning to dig or to hollow out, describing the pit-shaped installation itself. BDB divides the nine occurrences into literal use inside similes (Proverbs 17:3; 27:21; Ezekiel 22:18, 20, 22) and figurative use: the iron-furnace phrase of Deuteronomy 4:20, 1 Kings 8:51 and Jeremiah 11:4, and the furnace of affliction in Isaiah 48:10. Scholarly discussion has centered less on the lexeme, whose sense is not in doubt, than on the force of the Deuteronomic phrase: commentators debate whether the iron-furnace image imports a refining purpose for the Egyptian bondage or functions as a superlative for extreme heat and hardship, iron requiring the highest working temperatures of the metals known to the biblical writers. On Isaiah 48:10 the exegetical question is whether the furnace of affliction refines Israel effectively or, given the qualifying phrase "not as silver", falls short of full refinement. In Ezekiel 22:17 to 22 the metallurgical imagery is worked out at length, with Jerusalem as the furnace and its population as base metal and dross.

Sources

  • HALOT, s.v. כּוּרlexicon
  • BDB, s.v. כּוּרlexicon
  • DCH, s.v. כּוּרlexicon
  • Moshe Weinfeld, Deuteronomy 1-11, Anchor Bible 5 (New York: Doubleday, 1991)commentary
  • Walther Zimmerli, Ezekiel 1, Hermeneia (Philadelphia: Fortress, 1979)commentary
  • Joseph Blenkinsopp, Isaiah 40-55, Anchor Bible 19A (New York: Doubleday, 2002)commentary

All attested forms of כּוּר

m s absolute

כּוּר, וְכוּר

Ezk 22:18, Ezk 22:20, Ezk 22:22, Pro 17:3, Pro 27:21

m s construct

מִכּוּר, בְּכוּר, כּוּר

Deu 4:20, Jer 11:4, Isa 48:10, 1Ki 8:51