ξύμβασιν (xymbasin)
ξύμβασιν is an Ancient Greek form of σύμβασις, meaning “agreement, truce”. It is the accusative singular feminine noun.
Found 25 times in the Ancient Greek texts on Socratos.
Where it is used
Thucydides, History of the Peloponnesian War 1.61.3: προσκαθεζόμενοι δὲ καὶ αὐτοὶ τὴν Πύδναν ἐπολιόρκησαν μέν, ἔπειτα δὲ ξύμβασιν ποιησάμενοι καὶ ξυμμαχίαν ἀναγκαίαν πρὸς τὸν Περδίκκαν, ὡς αὐτοὺς κατήπειγεν ἡ Ποτείδαια καὶ ὁ Ἀριστεὺς παρεληλυθώς, ἀπανίστανται ἐκ τῆς Μακεδονίας,
All forms of σύμβασις (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.