Accusative: degree/measure as satellite

Syntactical Level

ἐν τῷ παραχρῆμα οὐκ ἔστιν ἀρχὴν ὀρθῶς βουλεύεσθαι

Voor het ogenblik is het volkomen onmogelijk een juiste beslissing te nemen.

Antiphon van Rhamnous, Over de moord op Herodes 73

The accusative expresses a degree or measure as satellite.

Lexical usage

Expressions of degree or measure are often almost adjectival: (τὴν) ἀρχήν οὐ/μή ‘not at all, not in the least’, τὸ ἐλάχιστον ‘at least’, μέγα, μεγάλα ‘to a large extent’, πολύ, πολλά ‘very’ τὸ πολύ, τὰ πολλά ‘largely, for the greater part’.
Pronouns are also frequently used in the accusative: οὐδέν or μηδέν ‘by no means’, ὅσον, ὅσα ‘as many as’, τι ‘somewhat, to some extent’, τοσοῦτον, τοσαῦτα ‘to that extent’. With comparatives the dative is more common.

Example Sentences: 

ἁλὴς δὲ ἐὼν ὁ ναυτικὸς στρατὸς δυσμεταχείριστός τε αὐτοῖσι γίνεται, καὶ ἀρχὴν οὐκ ἀξιόμαχοί τοι ἔσονται

When the navy is gathered it is invincible to them (= the enemy), and they will by no means be able to give battle.

Δάματερ μέγα χαῖρε πολύτροφε πουλυμέδιμνε

Many greetings, Demetrius, well-fed and possessing many medimni.

ἀλλ’ οὐδέν τι χαλεποῦ πράγματος ἐπιθυμεῖς, ὦ Ἀλκιβιάδη, φάναι τὸν Περικλέα, βουλόμενος γνῶναι τί ἐστι νόμος

Well, Alcibiades, Pericles said, you do not desire a very difficult matter, if you wish to know what a law is.