διάημι
From LSJ
Τὸ νικᾶν αὐτὸν αὑτὸν πασῶν νικῶν πρώτη τε καὶ ἀρίστη. Τὸ δὲ ἡττᾶσθαι αὐτὸν ὑφ' ἑαυτοῦ πάντων αἴσχιστόν τε ἅμα καὶ κάκιστον. → Τo conquer yourself is the first and best victory of all, while to be conquered by yourself is of all the most shameful as well as evil
English (LSJ)
[ᾰ], impf. διάην, Ep. Verb,
A blow through, c. acc., τοὺς [θάμνους] . . οὔτ' ἀνέμων διάη μένος Od.5.478; πώεα . . οὐ διάησι ἲς ἀνέμου Hes.Op.517: c. gen., τῶν [οὐρῶν] ψυχρὸς ἐὼν διάησι [Βορέας] ib.514.