Feminine of 'aphel; duskiness, figuratively, misfortune; concrete, concealment -- dark, darkness, gloominess, X thick.
see HEBREW 'aphel
H653. aphelah
אֲפֵלָה noun feminine darkness, gloominess, calamity — ׳א Exodus 10:22 +; אֲפֵלָתְךָ Isaiah 58:10; plural אֲפֵלוֺת 59:9 —
1 darkness Deuteronomy 28:29; Proverbs 7:9 ("" לַיְלָה אִישׁוֺן); of supernatural darkness in Egypt Exodus 10:22; of day of .׳י (compare Amos 5:20 below אָפֵל) Joel 2:2; Zephaniah 1:15 (both "" רְפל ענן, חשׁך) simile of wickedness Jeremiah 23:18; Proverbs 4:19.
2 figurative of calamity Isaiah 8:22 ("" חֲשֵׁכָה), 58:10 ("" חשׁך, opposed to צהרים ), 59:9 ("" id., opposed to נגהות)