Strong's Concordance

Original word: מַהֲמֹרוֹת
Transliteration: mahamorah
Definition (short): pits
Definition (full): a flood, watery pit

NAS Exhaustive Concordance

Word Origin: from an unused word
Definition: a flood, watery pit
NASB Translation: deep pits (1).
NAS Exhaustive Concordance of the Bible with Hebrew-Aramaic and Greek Dictionaries.
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Strong's Exhaustive Concordance

From an unused root of uncertain meaning; perhaps an abyss -- deep pit.
KJV: Let burning coals fall upon them: let them be cast into the fire; into deep pits, that they rise not up again.
NASB: "May burning coals fall upon them; May they be cast into the fire, Into deep pits from which they cannot rise.