ἀπροβούλως
From LSJ
Περὶ τοῦ ἐπέκεινα τοῦ νοῦ κατὰ μὲν νόησιν πολλὰ λέγεται, θεωρεῖται δὲ ἀνοησίᾳ κρείττονι νοήσεως → On the subject of that which is beyond intellect, many statements are made on the basis of intellection, but it may be immediately cognised only by means of a non-intellection superior to intellection
French (Bailly abrégé)
adv.
sans préméditation, sans défiance.
Étymologie: ἀπρόβουλος.
Russian (Dvoretsky)
ἀπροβούλως: необдуманно, легкомысленно Aesch.