Rules and examples of accentuation for adverbial and related suffixes (‑ις, ‑δις, ‑ος, etc.), listing specific words and dialectal notes (Doric proparoxytone, Aeolic forms), with citations (Od. ε 481, Aristophanes).
λικριφίς, κραταιΐς, αὐτονυχίς. λέγεται δὲ καὶ αὐτονυχιδίς καὶ αὐτονυχί, παμπηδονίς, λέγεται δὲ καὶ πάμπαν καὶ παμπήδην καὶ παμπηδόν, σολικρίς (?), ἀμφικελεμνίς. τὸ μέντοι πέρυτις προπαροξυνόμενον Δώριόν ἐστιν ἐκ τοῦ πέρυσι μεταποιηθὲν καὶ οὐ μάχεται. τὰ διὰ τοῦ 'ακις' παροξύνεται, πολλάκις, ὀλιγάκις, τοσαυτάκις. καὶ τὰ εἰς 'δις' τρισύλλαβα τῷ 'α' παραληγόμενα παροξύνεται, χαμάδις, φυγάδις, ὀκλάδις, κρυφάδις, ἐσχάδις (?), πτακάδις, μιγάδις, ἁμάδις. τὸ ὠμαδίς ὀξύνεται καὶ ἴσως ἐκ τοῦ κατωμαδίς ἀφῃρέθη. τὸ οἴκαδις σεσημείωται προπαροξυνόμενον. τὰ δὲ ὑπερτρισύλλαβα ἢ ὅσα μακρᾷ φύσει ἢ θέσει παραλήγεται, πάντα ὀξύνεται, λαθρηδίς, κωπηδίς, αἰφνηδίς, στοιχηδίς, ἀντηδίς, ἀμοιβηδίς· λέγεται καὶ ἀμοιβηδόν, ἐπαμοιβαδίς »ἀλλήλοισιν ἔφυν ἐπαμοιβαδίς« (Od. ε 481), ἐμβολαδίς, κατωμαδίς, ἀμφουδίς, ἐπουδίς, ἀκροπουδίς. Τὰ δὲ τῷ 'υ' παραληγόμενα προπαροξύνεται, ἄλλυδις, ἄμυδις Αἰολικὸν ἔχον τὸ πνεῦμα. * Τὰ εἰς 'δις' ἐπιρρήματα ἔχοντα πρὸ τοῦ 'δ' τὴν 'αν' συλλαβὴν Δώριά ἐστι καὶ παροξύνεται, χαμάνδις, ἀγράνδις, Ὀλυμπιάνδις. Τὰ εἰς 'ος' ἀπὸ προθέσεως παραχθέντα, εἰ ἔχοι τὸ 'τ', ὀξύνεται, ἐντός, ἐκτός. τὰ δὲ ἄλλα βαρύνεται, πάρος, ἦμος, τῆμος, ὁπῆμος, τημοῦτος, κῆχος. »ποῖ κῆχος; εἰς οὐρανόν« καὶ Ἀριστοφάνης
λικριφίς, κραταιΐς, αὐτονυχίς. It is also said αὐτονυχιδίς and αὐτονυχί; παμπηδονίς—it is also said πάμπαν and παμπήδην and παμπηδόν—σολικρίς (?), ἀμφικελεμνίς. The form πέρυτις, however, when accented on the antepenult, is Doric, altered from πέρυσι, and is not at variance. The forms in -ακις are accented on the penult: πολλάκις, ὀλιγάκις, τοσαυτάκις. And the trisyllables in -δις with α in the penult are accented on the penult: χαμάδις, φυγάδις, ὀκλάδις, κρυφάδις, ἐσχάδις (?), πτακάδις, μιγάδις, ἁμάδις. ὠμαδίς is accented with an acute, and perhaps was taken by aphairesis from κατωμαδίς. οἴκαδις is noted as accented on the antepenult. But the forms of more than three syllables, or those whose penult is long by nature or by position, are all accented with an acute: λαθρηδίς, κωπηδίς, αἰφνηδίς, στοιχηδίς, ἀντηδίς, ἀμοιβηδίς; it is also said ἀμοιβηδόν; ἐπαμοιβαδίς, “ἀλλήλοισιν ἔφυν ἐπαμοιβαδίς” (Od. ε 481); ἐμβολαδίς, κατωμαδίς, ἀμφουδίς, ἐπουδίς, ἀκροπουδίς. But those with υ in the penult are accented on the antepenult: ἄλλυδις, ἄμυδις, Aeolic in having the breathing. The adverbs in -δις that have the syllable αν before δ are Doric and are accented on the penult: χαμάνδις, ἀγράνδις, Ὀλυμπιάνδις. The forms in -ος derived from a preposition, if they have τ, are accented with an acute: ἐντός, ἐκτός; but the others have a grave: πάρος, ἦμος, τῆμος, ὁπῆμος, τημοῦτος, κῆχος. “ποῖ κῆχος; εἰς οὐρανόν,” and Aristophanes.