A primitive root; to be dark (as withholding light); transitively, to darken -- be black, be (make) dark, darken, cause darkness, be dim, hide.
H2821. chashak
חָשַׁךְ verb be, grow dark (Late Hebrew id.; Aramaic חֲשַׁךְ, ; Arabic bear rancour, see LagBN 30) —
Qal Perfect ׳ח Isaiah 5:30 4t.; וְחָֽשְׁכָה consecutive Micah 3:6 (but see below); חָֽשְׁכוּ Lamentations 5:17; וְחָֽשְׁכוּ consecutive Ecclesiastes 12:3; Imperfect3feminine singular תֶּחְשַׁךְ 12:2; וַתֶּחְשַׁךְ Exodus 10:15; 3masculine plural יֶחְשְׁכוּ Job 3:9; 3feminine plural תֶּחְשַׁכְנָה Psalm 69:24; —
1 be, grow dark, אוֺר Isaiah 5:30, compare (figurative) Job 18:6; הַשֶּׁמֶשׁ Isaiah 13:10 (figurative); היום Ezekiel 30:18 (where read חשׁך, for ᵑ0 Baer חשׂך); Job 3:9 (subject כוכבים), compare Ecclesiastes 12:2 (subject הכוכבים הירח, האור, השׁמשׁ,); impersonal Micah 3:6; (si vera 1.; but read probably וַחֲשֵׁכָה, corresponding with לַיְלָה preceding).
2 have a dark colour: תָּֽאֳרָם ׳ח מִשְּׁחוֺר Lamentations 4:8 darker than blackness is their visage; of the earth הָאֶרֶץ Exodus 10:15.
3 grow dim Lamentations 5:17 (subject עינינו), compare Psalm 69:24 (figurative), Ecclesiastes 12:3 subject הָראֹוֺת i.e. the eyes.
Hiph`il Perfect הֶחְשִׁיךְ Amos 5:8, וְהַחֲשַׁכְתִּ֫י 8:9; Imperfect יַחֲשִׁיךְ Psalm 139:12; יַחְשִׁךְ Jeremiah 13:16;וַיַּחְשִׁךְ Psalm 105:28; Participle מַחְשִׁיךְ Job 38:2; —
1 make dark, הח לילה ׳יום Amos 5:8; absolute cause darkness Jeremiah 13:16; Psalm 105:28, compare Amos 8:9 (לארץ).
2 = hide, conceal, followed by מִמֶּךָּ Psalm 139:12.
3 figurative obscure, confuse Job 38:2 (object עֵצָה).