ἀπροβούλευτος
From LSJ
Ἀναβάντα γὰρ εἰς τὴν ἀκρόπολιν, καὶ διὰ τὴν ὑπερβολὴν τῆς λύπης προσκόψαντα τῷ ζῆν, ἑαυτὸν κατακρημνίσαι → For he ascended the acropolis and then, because he was disgusted with life by reason of his excessive grief, cast himself down the height
English (LSJ)
ον,
A unpremeditated, Arist.EN1135b11; λόγοι Thphr. Char.3.1; not deliberated upon, D.H.4.72, J.BJ3.5.6. 2 not submitted to the βουλή, D.22.5, Hyp.Fr.231, Plu.Sol.19; of the Roman Senate, App.BC1.59. II Act., without forethought or premeditation, Arist.EN1151a3, Ceb.8. Adv. -τως Pl.Lg.867a, 867b; ἀ. τοῦ ἀποκτεῖναι without purpose of .., ib.866e.