ϫⲱⲙ (čōm, “papyrus scroll, book”) + ⲛ̀- (ǹ-, attributive particle) + ⲥϧⲁⲓ (sxai, “writing”).
ϫⲱⲙⲛⲥϧⲁⲓ • (čōmnsxai) m