μαρτυρίου (martyriou)
μαρτυρίου is an Ancient Greek form of μαρτύριον, meaning “proof, evidence”. It is the genitive singular neuter noun.
Found 29 times in the Ancient Greek texts on Socratos.
Where it is used
Thucydides, History of the Peloponnesian War 1.33.1: … υσι τὴν ἐπικουρίαν ποιήσεσθε, ἔπειτα περὶ τῶν μεγίστων κινδυνεύοντας δεξάμενοι ὡς ἂν μάλιστα μετ’ αἰειμνήστου μαρτυρίου τὴν χάριν καταθήσεσθε· ναυτικόν τε κεκτήμεθα πλὴν τοῦ παρ᾽ ὑμῖν πλεῖστον.
All forms of μαρτύριον (declension 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.