¹ sn The precise point of vv. 20-21 is not entirely clear. Are they taking the idols into their hiding places with them because they are so attached to their man-made images? Or are they discarding the idols along the way as they retreat into the darkest places they can find? In either case it is obvious that the gods are incapable of helping them.

⁴ sn The imagery of a star seems to fit the nautical theme that Jude is developing. Stars were of course the guides to sailors at night, just as teachers are responsible to lead the flock through a benighted world. But false teachers, as wayward stars, are not fixed and hence offer unreliable, even disastrous guidance. They are thus both the dangerous reefs on which the ships could be destroyed and the false guides, leading them into these rocks. There is a special irony that these lights will be snuffed out, reserved for the darkest depths of eternal darkness.

⁹ tn The noun שַׁלְהֶבֶתְיָה (shalhevetyah, “mighty flame”) is related to the nouns שַׁלְהֶבֶת (shalhevet, “flame”), לֶהָבָה (lehavah, “flame”), and לַהַב (lahav, “flame”), all of which are derived from the root להב “to burn, blaze, flame up” (HALOT 520 s.v. לַהַב). The form שַׁלְהֶבֶתְיָה is an unusual noun pattern with (1) a prefix שׁ (shin) that is common in Akkadian but rare in Hebrew; it has an intensive adjective meaning, (2) a feminine ת (tav) ending, and (3) a suffix ־יָה (yah) whose meaning is debated. The suffix ־יָה has been taken in three ways by scholars and translators: (1) יָה is an abbreviated form of the divine name יהוה (“Yahweh”), functioning as a genitive of source: “the flame of the Lord” (NASB). The abbreviated form יָהּ is used only in poetic texts as a poetic variation of יהוה (e.g., Exod 15:2; 17:16; Pss 68:5, 19; 77:12; 89:9; 94:7, 12; 102:19; 104:35; 105:45; 106:1, 48; 111:1; 112:1; 113:1, 9; 115:17, 18; 116:19; 117:2; 118:5, 14, 17-19; 122:4; 130:3; 135:1, 3, 4, 21; 146:1, 10; 147:1, 20; 148:1, 14; 149:1, 9; 150:1, 6; Isa 12:2; 26:4; 38:11). However, the Masoretes did not point the text as שַׁלְהֶבֶת־יָהּ (shalhevet yah) with maqqef and dagesh in the הּ, as would be the case with the divine name. (2) Thomas suggests that, just as אֱלֹהִים (ʾelohim) and אֵל (ʾel) are sometimes used to express superlatives or intensive ideas, so יָה expresses the superlative/intensive: “a mighty flame” (D. W. Thomas, “A Consideration of Some Unusual Ways of Expressing the Superlative in Hebrew,” VT 3 [1953]: 209-24). Examples of אֱלֹהִים (ʾelohim): “a mighty wind” (Gen 1:2), “a mighty prince” (Gen 23:6), “a great struggle” (Gen 30:8), “a great fire” (Job 1:16), “an exceeding great city” (Jonah 3:3). Examples of אֵל (ʾel): “the mighty mountains” (Ps 36:7) and “the mighty cedars” (Ps 80:11). Examples of יָה (yah) suffixed: “darkest gloom” (Jer 2:31), “mighty deeds” (Jer 32:19), and “mighty deeds” (Ps 77:12). (3) The most likely view is that יָה is an intensive adjectival suffix, similar to—iy and—ay and—awi in Aramaic, Akkadian, and Arabic: “a most vehement flame” (KJV), “a mighty flame” (RSV, NIV), and “a blazing flame” (NJPS). This also best explains “darkest gloom” (Jer 2:31), and “mighty deeds” (Jer 32:19) (see S. Moscati, Comparative Grammar, 81, §12.18, and 83, §12.23).