H4285. machshak
מַחְשַׁךְ noun masculine dark place (poetry) — absolute ׳מ [Isa 29:15]; [42:16]; מַחְשָׁ֑ךְ Psalm 88:19; plural מַחֲשַׁכִּים [Psa 88:7]; [143:3] = [Lam 3:6] construct מַחֲשַׁכֵּי [Psa 74:20]; — dark place:
a. = hiding-place אֿרץ׳מח [Psa 74:20].
b. dark region, in which men may lose their way [Isa 42:16].
c. = grave, or שׁאול Psalm 88:19 (see Che); of dark place of God's wrath (like She' ô l) [Psa 88:7]; compare [143:3] = [Lam 3:6].
d. = secret place, secrecy (of plots) [Isa 29:15].