Then set it empty upon the coals thereof, that the brass of it may be hot, and may burn, and that the filthiness of it may be molten in it, that the scum of it may be consumed.
Original word: אָפֵל
Transliteration: aphel
Definition (short): gloom
Definition (full): gloomy
Word Origin:
from the same as ophel
Definition: gloomy
NASB Translation: gloom (1).
NAS Exhaustive Concordance of the Bible with Hebrew-Aramaic and Greek Dictionaries.
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From an unused root meaning to set as the sun; dusky -- very dark.
KJV:
Shall not the day of the LORD be darkness, and not light? even very dark, and no brightness in it?
NASB:
Will not the day of the LORD be darkness instead of light, Even gloom with no brightness in it?