προδιαφθείρω

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.