BDB3960
כּוּר noun [masculine] smelting-pot or furnace (Arabic [untranscribed source text 2484]; Late Hebrew id.; Aramaic id., [untranscribed source text 2485]; Ethiopic [untranscribed source text 2486]) — pot or furnace for smelting metals, but always in metaphor or simile of human sufferings in punishment or discipline: iron (figurative of Egypt as place of bondage) הַבַּרְזֶל ׳ מִכּ Deut 4:20; Jer 11:4, ׳ הַבּ ׳ מִתּוֺךְ כ 1Kgs 8:51 gold לַזָּהָב ׳ כ Prov 17:3 = Prov 27:21 (|| מַצְרֵף); various metals Ezek 22:18; Ezek 22:20; Ezek 22:22 once בְּכוּר עֹ֑נִי Isa 48:10 in a smelting-pot of affliction.