From uwr; a cavern (as dark) -- cave, den, hole.
see HEBREW uwr
H4631. mearah
מְעָרָה40 noun feminine cave; — absolute ׳מ Genesis 19:30 +; construct מְעָרַת 23:19 +; plural מְעָרוֺת Judges 6:2 +, construct id. Isaiah 2:19; — cave, especially as place of sojourn or refuge Genesis 19:30 (J), 1 Samuel 24:3 (twice in verse); 24:7; 24:8; 24:10 (Ginsb; v.24:4; v.24:8; v.24:9; v.24:11 van d. H. Bear), 1 Kings 19:1, 13; Ezekiel 33:27; Joshua 10:16 (׳מ בַמַּקֵּדָה) + 7 t. Joshua 10; Judges 6:2; 1 Samuel 13:6; 1 Kings 18:4, 13, compare Psalm 57:1; 142:1; צֻרִים מְעָרוֺת Isaiah 2:19, hence ׳מ מָּרִצִים Jeremiah 7:11 robbers' cave; Isaiah 32:14 den (of wild beasts); — ׳מ עֲדֻלָּם 1 Samuel 22:1; 2 Samuel 23:13, whence in "" 1 Chronicles 11:15, read probably ע ׳מְצֻדַת or מְצָדַת We, compare Dr, Bu Kit HPS; — as burial place, ׳מ הַמַּכְמֵּלָה Genesis 23:9 + (see מַכְמֵּלָה) = ׳מ alone 23:11, 17, 20; 49:29, 32 (all P). ׳מ לַצִּידֹנִים אֲשֶׁר Joshua 13:4 (D), cave-region in Lebanon east of Sidon, modern Mughâr Gezzîn, according to most, but dubious; perhaps, rather, near Tyre BuhlMDPV 1895, 55.