λῃστικῶς

From LSJ

φλαύραν δ' οὐ σπάνις γυναῖκ' ἔχειν → it is not difficult to have a bad wife

Source

French (Bailly abrégé)

adv.
à la manière des brigands ou des pirates;
Cp. λῃστικώτερον.
Étymologie: λῃστικός.

Russian (Dvoretsky)

λῃστικῶς: по-разбойничьи Thuc.