Genitive with compound verbs

Syntactical Level

πολλοῖς ἡ γλῶττα προτρέχει τῆς διανοίᾱς

Want bij vele mensen haalt de tong het verstand in.

The genitive signals an object with a number of compound verbs (with ἀπο-, ἐκ-, κατα-, προ- etc.).

Lexical usage

The semantic role of the object depends on the meaning which the prefix has in the compound in question. Common prefixes include ἀπο- and ἐκ- (source), κατα- (malefactive) and προ- (place or standard of comparison). Less frequent are ἐπι- and περι-.
Verbs of accusing and condemning are often compounded with κατα-: καταδικάζω, καταγιγνώσκω, καταψηφίζομαι 'to condemn'.
καταγελάω 'to ridicule', καταφρονέω 'to despise', κατηγορέω 'to accuse'

Syntactic behaviour

The genitive cannot be converted into the subject of a passive predicate, although a different object can.

Example Sentences: 

εἰσελκύσας γάρ μ’ ἐς τὸ βουλευτήριον | διέβαλλε καὶ ψευδῆ κατεγλώττιζέ μου

Want [Kleon] heeft mij voor het gerecht gesleept, waar hij me aanklaagde en met leugenachtige woorden overstelpte.

οὐ Λακεδαιμόνιοι, τοὺς μὲν συμμάχους ἀποτρέψαντες τῆς γνώμης, αὐτοὶ δ’ οὐδ’ ἐπιχειρήσαντες διαβουλεύσασθαι περὶ τοιούτων ἔργων;

Brachten de Spartanen hun bondgenoten niet af van hun voornemen, en begonnen ze zelfs niet zelf zulke acties te overwegen?

ὁ δὲ τῶν μὲν θάνατον κατεδίκαζε, τῶν δὲ φυγήν

He condemned some to death, others to exile.