ΣΆΚΚΟΣ: σάκκος also written σάκος, -ου, ὁ [ (cf. Heb. שַׂק, which it renders in LXX), ] 1. . a coarse cloth, sackcloth, usually made of hair: Re 6:12.
2. . Anything made of sackcloth; (a) . a sack (Ge 42:25, al.); (b) . a garment of sackcloth, expressive of mourning or penitence: Mt 11:21, Lk 10:13, Re 11:3.†