From darash; properly, an investigation, i.e. (by implication) a treatise or elaborate compilation -- story.
see HEBREW darash
H4097. midrash
[מִדְרָשׁ] noun [masculine] study, exposition, midrash, only construct מִדְרַשׁ (late; common in Late Hebrew, in sense of imaginative exposition or didactic story) — הַמְּלָכִים סֵפֶר מִדְרַשׁ midrash of the book of Kings2 Chronicles 24:27; עִדּוֺ הַנָּבִיא מִדְרַשׁ midrash of the prophet Iddo13:22. These were probably of a didactic character, compare DrIntr 497.