προδιαφθείρω
From LSJ
αἰὲν ἀριστεύειν καὶ ὑπείροχον ἔμμεναι ἄλλων → always strive for excellence and prevail over others (Iliad 6.208, 11.784)
English (LSJ)
A ruin, destroy beforehand, ναῦς ταῖς ἐμβολαῖς Plb.16.6.13:—Pass., Th.1.119, 6.78: c. gen., Lib.Or. 22.32. II corrupt, demoralize beforehand, τοὺς κριτάς prob. for προσ- in D.21.18; ἡγεμόνας Plb.5.4.11:—Pass., Isoc.Ep.2.8. 2 Pass., of milk, go bad beforehand, Sor.1.88.