χρηστομαθέω
From LSJ
χαῖρ', ὦ μέγ' ἀχρειόγελως ὅμιλε, ταῖς ἐπίβδαις, τῆς ἡμετέρας σοφίας κριτὴς ἄριστε πάντων → all hail, throng that laughs untimely on the day after the festival, best of all judges of our poetic skill
English (LSJ)
A to be desirous of learning, Longin.2.3.
German (Pape)
[Seite 1376] lernbegierig, wißbegierig sein, Longin. 2, 8.