flighty
From LSJ
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).