συγκαθεύδειν
From LSJ
Οὐκ ἔστιν αἰσχρὸν ἀγνοοῦντα μανθάνειν → Non est inhonestum ea, quae nescis, discere → nicht schändlich ist's, dass einer lernt, was er nicht weiß
Greek > English (Woodhouse Verbs Reversed)
(see also καθεύδω): sleep with another