ἀναιτίως
From LSJ
ξένος ὢν ἀκολούθει τοῖς ἐπιχωρίοις νόμοις → as a foreigner, follow the laws of that country | when in Rome, do as the Romans do
French (Bailly abrégé)
adv.
sans cause.
Étymologie: ἀναίτιος.
Russian (Dvoretsky)
ἀναιτίως: беспричинно Plut., Sext.