εἰδεῖεν (eideien)
εἰδεῖεν is an Ancient Greek form of οἶδα, meaning “to know”.
Found 31 times in the Ancient Greek texts on Socratos.
Where it is used
Diogenes Laertius, Vitae philosophorum 2.8.72: … ι, πρίω, ἔφη, καὶ ἕξεις δύο. ἀργύριον εἶπε παρὰ τῶν γνωρίμων λαμβάνειν, οὐχ ἵνʼ αὐτὸς χρῷτο, ἀλλʼ ἵνʼ ἐκεῖνοι εἰδεῖεν εἰς τίνα δεῖ χρῆσθαι τοῖς ἀργυρίοις. ὀνειδιζόμενός ποτε ὅτι δίκην ἔχων ἐμισθώσατο ῥήτορα, καὶ γάρ, ἔφη, ὅταν …
Xenophon, Apology 23: … ἀδικεῖν. ἔπειτα τῶν ἑταίρων ἐκκλέψαι βουλομένων αὐτὸν οὐκ ἐφείπετο, ἀλλὰ καὶ ἐπισκῶψαι ἐδόκει ἐρόμενος εἴ που εἰδεῖέν τι χωρίον ἔξω τῆς Ἀττικῆς ἔνθα οὐ προσβατὸν θανάτῳ.
All forms of οἶδα (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.