δυσεκπόνητος
From LSJ
τὸ ἓν καὶ τὸ ὂν πολλαχῶς λέγεται → the term being and the term one are used in many ways, one and being have various meanings, one and being have many senses
English (LSJ)
ον, τιμωρίας καὶ πόνους δυς[εκπο] νήτους A hard to endure, Phld.Herc.1251.12 (dub. rest.).
Spanish (DGE)
-ον difícil de soportar πόνοι Phld.Elect.12.8.