flighty
From LSJ
Ἕκτορ νῦν σὺ μὲν ὧδε θέεις ἀκίχητα διώκων → Hector, you run in pursuit of something unattainable | Hector, now art thou hasting thus vainly after what thou mayest not attain | Hector, now you are hasting thus vainly after what you may not attain
English > Greek (Woodhouse)
adj.
Careless: P. and V. ῥᾴθυμος. Light-minded: V. κουφόνους. Fickle: P. and V. ἔμπληκτος. Now are you flighty and your wisdom is as folly: V. νῦν γὰρ πέτει τε καὶ φρονῶν οὐδὲν φρονεῖς (Eur., bacch. 332).