Dict: strongs - sackcloth

Strongs:

H6937 @ קדר qâdar kaw-dar' A primitive root; to be {ashy} that {is} dark colored; by implication to mourn (in sackcloth or sordid garments): - be black ({-ish}) be (make) dark ({-en}) X {heavily} (cause to) mourn.

H6941 @ קדרנּית qedôrannîyth ked-o-ran-neeth' Adverb from H6937; blackish ones (that {is} in sackcloth); used adverbially in mourning weeds: - mournfully.

G4526 @ σάκκος sakkos sak'-kos Of Hebrew origin [H8242]; sack cloth that is mohair (the material or garments made of it worn as a sign of grief): - sackcloth.