δύσλυτος
From LSJ
εἰργόμενον θανάτου καὶ τοῦ ἀνάπηρον ποιῆσαι → excluding death and maiming, short of death or maiming
English (LSJ)
ον,
A indissoluble, δυσλύτοις χαλκεύμασι A.Pr.19; ἄκος τῶν δ. πόνων E.Andr.121 (lyr.); ὦμοι stiff, Arist.Phgn.811a4. Adv. -τως, ἔχειν X.Oec.8.13. 2 insoluble, of a problem, Luc.JTr.12, Alex.Aphr. in Metaph.223.2; αἴνιγμα Plu.Fr.25.3; hard to refute, Alex.Aphr.in Top.558.25.