From dashen; the fat; abstractly fatness, i.e. (figuratively) abundance; specifically the (fatty) ashes of sacrifices -- ashes, fatness.
see HEBREW dashen
H1880. deshen
דֶּ֫שֶׁן noun masculine fatness, fat ashes — absolute ׳ד Psalm 63:6 8t., דָּ֑שֶׁן Leviticus 1:16 3t.; construct דֶּשֶׁן Psalm 36:9; suffix דִּשְׁנִי Judges 9:9 —
1 fatness, abundance, luxuriance, oil, Judges 9:9 (of olive tree); abundance, fertility Psalm 63:6 (in simile "" חֵלֶב), 65:12, of food and drink, Job 36:16; Jeremiah 31:14; passing over into figurative of spiritual blessing Psalm 36:9 (׳ד ביתך), Isaiah 55:2.
2 fat ashes, i.e. ashes of victims, mixed with the fat Leviticus 1:16; 4:12 (twice in verse); 6:3; 6:4 (all P) Jeremiah 31:40; 1 Kings 13:3, 5.