μαρτυροῦσιν (martyrousin)
μαρτυροῦσιν is an Ancient Greek form of μαρτυρέω, meaning “bear witness, testify”.
It can also be a form of μαρτύρομαι, “call to witness, protest”. It is the 3rd person plural present active indicative.
Found 45 times in the Ancient Greek texts on Socratos.
Where it is used
Plutarch, Lycurgus 4.6: συγγραφέων μαρτυροῦσιν· ὅτι δὲ καὶ Λιβύην καὶ Ἰβηρίαν ἐπῆλθεν ὁ Λυκοῦργος καὶ περὶ τὴν Ἰνδικὴν πλανηθεὶς τοῖς Γυμνοσοφισταῖς ὡμίλησεν, οὐδένα πλὴν Ἀριστοκράτη τὸν Ἱππάρχου Σπαρτιάτην εἰρηκότα γινώσκομεν.
Dionysius of Halicarnassus, De Thucydide 34: … έβληνται· οὗτοί τε ὑπὸ τῆς μιᾶς ταύτης ἀρετῆς κεκαρωμένοι τὴν διάνοιαν ἅπαντα καὶ τὰ μὴ προσόντα τῷ συγγραφεῖ μαρτυροῦσίν· ἃ γὰρ ἕκαστος εἶναι βούλεται περὶ τὸ φιλούμενόν τε καὶ θαυμαζόμενον ὑφʼ ἑαυτοῦ, ταῦτα οἴεται.
All forms of μαρτυρέω (conjugation table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Liddell-Scott-Jones, A Greek-English Lexicon (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.