ναυσίν (nausin)
ναυσίν is an Ancient Greek form of ναῦς, meaning “ship”. It is the dative plural feminine noun.
Found 447 times in the Ancient Greek texts on Socratos.
Where it is used
Thucydides, History of the Peloponnesian War 1.5.1: … αι καὶ τῶν βαρβάρων οἵ τε ἐν τῇ ἠπείρῳ παραθαλάσσιοι καὶ ὅσοι νήσους εἶχον, ἐπειδὴ ἤρξαντο μᾶλλον περαιοῦσθαι ναυσὶν ἐπ’ ἀλλήλους, ἐτράποντο πρὸς λῃστείαν, ἡγουμένων ἀνδρῶν οὐ τῶν ἀδυνατωτάτων κέρδους τοῦ σφετέρου αὐτῶν ἕνεκα …
Sappho, Poems and Fragments (ed. Edmonds 1922) 66.8: ἄβραν Ἀνδρομάχαν ἐνὶ ναῦσιν ἐπʼ ἄλμυρον
All forms of ναῦς (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.