Or (feminine) gacheleth {gah-kheh'-leth}; from an unused root meaning to glow or kindle; an ember -- (burning) coal.
H1513. gechel
or gacheleth גַּחֶ֫לֶת noun feminineExodus 1:13 coal (compare Assyrian gu—lu, a shining precious stone? COTGloss ZimBP 45) — absolute גַּחֶלֶת Isaiah 47:14; suffix גַּחַלְתִּי 2 Samuel 14:7; plural גֶּחָלִים Psalm 18:9 6t.; construct גַּחֲלֵי Leviticus 16:12 5t. + Psalm 18:14 (strike out ᵐ5 De Che); suffix גֶּחָלָיו Isaiah 44:19, גֶּחָלֶיהָ Ezekiel 24:11; — coal, plural ׳ג אֵשׁ coals of fire Leviticus 16:12 (P), 2 Samuel 22:13 = Psalm 18:13 [also 18:14 compare above] Ezekiel 10:2 (in vision); compare 2 Samuel 22:9 = Psalm 18:9; Job 41:13, also Proverbs 6:28; Isaiah 44:19; in simile (of strife) Proverbs 26:21 (opposed to מֶּחָם black coal); Ezekiel 1:13 אֵשׁ גַּחֲלֵי (of the living creatures); figurative of hope in posterity 2 Samuel 14:7, of divine judgement, ׳ג רתם coals of broom-plant Psalm 120:4, compare 140:11, also (negative) Isaiah 47:14; Ezekiel 24:11; of kindness to enemy Proverbs 25:22.
גחם (? compare Arabic kindle, , burn).