δύσμαχος
From LSJ
Βέλτιστε, μὴ τὸ κέρδος ἐν πᾶσι σκόπει → Amice, ubique lucra sectari cave → Mein bester Freund, sieh nicht in allem auf Profit
English (LSJ)
ον,
A hard to fight with, unconquerable, X.HG4.2.10 (Comp.), E.Hec.1055 (Sup.); πάντων -ώτατον γυνή Id.Fr.544; of things, A.Pr.921, Pl.Lg.863b, D.1.4, etc. 2 generally, difficult, δ. κρῖναι A.Ag.1561 (lyr.).
