From an unused root meaning to hang down; a skirt; by implication, a bottom edge -- hem, skirt, train.
H7757. shul
[שׁוּל] noun masculineIsaiah 6:1 skirt, of robe; — plural construct שׁוּלֵי Exodus 28:34+; suffix שׁוּלַיִךְ Nahum 3:5 +, שׁוּלָיו Isaiah 6:1 +, שׁוּלֶיהָ Lamentations 1:9; — skirts; of ׳יs train, in vision Isaiah 6:1; elsewhere of city personified as woman, in phrase of ignominy, שׁוּלַיִךְ חָשַׂפְתִּי Jeremiah 13:26, שׁ ׳גִּלֵּתִי עַלמָּֿנַיִךְ Nahum 3:5, שׁ ׳נִגְּלוּ ׳ונו Jeremiah 13:22; of defilement, ׳בְּשׁ טֻמְאָתָהּ Lamentations 1:9; of high priest's robe Exodus 28:33 (twice in verse); 28:34 = 39:24-25, 26 (all P).
שׁוֺלָל see שׁלל.