old-fashioned
From LSJ
Νέος πεφυκὼς πολλὰ χρηστὰ μάνθανε → Dum floret aetas, disce, quod scitum decet → In jungem Alter lerne viel, was brauchbar ist
English > Greek (Woodhouse)
adjective
P. and V. παλαιός, ἀρχαῖος, P. ἀρχαιότροπος, Ar. ἀρχαικός, Ar. and P. πρεσβυτικός.
your notions are old-fashioned: Ar. φρονεῖς ἀρχαϊκά (Nubes 821).