From an unused root (meaning to frighten); frightful -- terrible.
Englishman's Concordance
1) terrible, dreadful Part of Speech: adjective A Related Word by BDB/Strong’s Number: from an unused root (meaning to frighten) Same Word by TWOT Number: 80a
Brown-Driver-Briggs
אָיֹםadjectiveterrible, dreadful — terrible, of Chaldeans אָיֹם וְנוֺרָא הוּאHabakkuk 1:7; of dignified woman, awe-inspiringאֲיֻמָּה כַּנִּדְגָלוֺתSongs 6:4,10.
Songs 6:4 HEB:נָאוָ֖ה כִּירוּשָׁלִָ֑ם אֲיֻמָּ֖ה כַּנִּדְגָּלֽוֹת׃ NAS: as Jerusalem, As awesome as an army with banners. KJV: as Jerusalem, terrible as [an army] with banners. INT: lovely Jerusalem awesome an army
Songs 6:10 HEB:בָּרָה֙ כַּֽחַמָּ֔ה אֲיֻמָּ֖ה כַּנִּדְגָּלֽוֹת׃ ס NAS: as the sun, As awesome as an army with banners?' KJV: as the sun, [and] terrible as [an army] with banners? INT: pure as the sun awesome an army
Habakkuk 1:7 HEB: אָיֹ֥ם וְנוֹרָ֖א ה֑וּא NAS:They are dreaded and feared; KJV:They [are] terrible and dreadful: INT:are dreaded and feared he
