πανσυδίᾳ
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)
Ep. πανσυδίῃ, or πασσυδίῃ, Adv., (σεύομαι)
A with all speed, Il.2.12, 11.709, 725, E.Tr.797 (anap.). II = πανστρατιᾷ, X.HG4.4.9, Ages.2.19 (cf. foreg.), Aen. Tact.15.9, Q.S.7.432, Tryph.142.
French (Bailly abrégé)
adv.
avec toute l’impétuosité possible, avec toute la vigueur possible, en toute hâte.
Étymologie: πᾶν, σεύω.