δύσθνητος
From LSJ
Κύριε, βοήθησον τὸν δοῦλον σου Νῖλον κτλ. → Lord, help your slave Nilos ... (mosaic inscription from 4th-cent. church in the Negev)
Spanish (DGE)
-ον
de agonía, agonizante στέρνων δ' ἄπο φύσημ' ἀνεὶς δύσθνητον E.Ph.1438 (cód., pero v. δύστλητος).