πνεῖν μεγάλα
From LSJ
τὴν πολιὴν καλέω Νέμεσιν πόθου, ὅττι δικάζει ἔννομα ταῖς σοβαραῖς θᾶσσον ἐπερχομένη → I call gray hairs the Nemesis of love, because they judge justly, coming sooner to the proud
Greek > English (Woodhouse)
be proud, be puffed up, be vain, give oneself airs, swell with pride, be arrogant