See the entire entry for paḥḥār, paḥḥārā n.m. clay

TgJob2:8 :ונסיב ליה פיחר לאתקרצפא/לאיתקרספא/ ביה : he took himself a potsherd to scrape himself with †

See the entire entry for qrṣp vb. Qt to scrape oneself