δυσεκπόνητος
From LSJ
Κύριε, βοήθησον τὸν δοῦλον σου Νῖλον κτλ. → Lord, help your slave Nilos ... (mosaic inscription from 4th-cent. church in the Negev)
English (LSJ)
δυσεκπόνητον, τιμωρίας καὶ πόνους δυς[εκπο] νήτους hard to endure, Phld.Herc.1251.12 (dub. rest.).
Spanish (DGE)
-ον difícil de soportar πόνοι Phld.Elect.12.8.