old-fashioned
From LSJ
ὅσῳ διαφέρει σῦκα καρδάμων → as different as chalk from cheese, different as chalk from cheese, apples and oranges, like apples and oranges, by as much as cardamom is different from figs
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).