ἀνάγκᾳ δ' οὐδὲ θεοὶ μάχονται → but not even gods fight necessity (Simonides, fr. 37.1.29)
careless: P. and V. ῥᾴθυμος; use heedless.
imprudent: P. and V. ἀσύνετος, ἄβουλος, P. ἀλόγιστος, V. κακόφρων (Euripides, Iphigenia in Aulis 391); see rash.
inconsiderate: P. and V. ἀγνώμων.
light-hearted: V. κουφόνους.