ἀπεριμερίμνως
From LSJ
ἀμήχανον δὲ παντὸς ἀνδρὸς ἐκμαθεῖν ψυχήν τε καὶ φρόνημα καὶ γνώμην, πρὶν ἂν ἀρχαῖς τε καὶ νόμοισιν ἐντριβὴς φανῇ → hard it is to learn the mind of any mortal or the heart, 'till he be tried in chief authority | it is impossible to know fully any man's character, will, or judgment, until he has been proved by the test of rule and law-giving
French (Bailly abrégé)
adv.
sans réflexion, sans prévoyance.
Étymologie: ἀ, περιμέριμνος.
Spanish (DGE)
adv. descuidada, irreflexivamente τὴν θύραν λελάκτικας Ar.Nu.136, cf. Synes.Dio M.66.1117D, Cyr.Al.M.68.473A.