From shakab; a bed (figuratively, a bier); abstractly, sleep; by euphemism, carnal intercourse -- bed((-chamber)), couch, lieth (lying) with.
see HEBREW shakab
H4904. mishkab
מִשְׁכָּב46 noun masculineLeviticus 15:4 place of lying, couch; act of lying; — absolute ׳מ 1 Kings 1:47 +, construct מִשְׁכַּב 2 Samuel 4:5 +; suffix מִשְׁכָּבִי Job 7:13 +, מִשְׁכַּבְכֶם Psalm 4:5; plural construct מִשְׁכְּבֵי Genesis 49:4 +, suffix מִשְׁכְּבוֺהָם Hosea 7:14 +, etc.; —
1 couch, bed (37 t.), 2 Samuel 4:11; Hosea 7:14; Micah 2:1; 1 Kings 1:47; Song of Solomon 3:1 +; לְמ ׳וְנָפַל Exodus 21:18 (E) he takes to his bed; ׳מ נִדָּתָהּ Leviticus 15:26 (P; see below I. נדד); ׳מ as place of copulation Genesis 49:4 (poem in J), Isaiah 57:7-8, (twice in verse); Proverbs 7:17; as place of burial Isaiah 57:2; Ezekiel 32:25; 2 Chronicles 16:14 (see ׳מ Inscription Tabnit8 and perhaps Jewish inscription Cooke341).
2 act of lying:
a. in General, מ ׳חֲדַר chamber of lying down = bed-chamber, Exodus 7:28 (E), 2 Samuel 4:7; 2 Kings 6:12, מִשְׁכָּֽבְךָ בְּחַדְרֵי Ecclesiastes 10:20; מ אֵת שֹׁכֵב ׳והוּא הַצָּהֳרַיִם 2 Samuel 4:5 his noon-day siesta; 17:28 read perhaps מ ׳עַרְשׂת couches for lying down Klo Bu HPS Now, compare ᵐ5.
b. (from context) sexually: of woman זָכָת מִשְׁכַּב לְ) (אִישׁ יֹדַעַת Judges 21:11-12, Numbers 31:17, 35 (P); of man אִשָּׁה מִשְׁכְּבֵי שׁכב Leviticus 18:22; 20:13 (+ אֶתזָֿכָר sodomy; H); מ ׳דֹּדִים Ezekiel 23:17.
שׁכב (√ of following; Biblical Hebrew מִשְׁכָּב שָׁכַב,).