усердно
From LSJ
ἐν πιθήκοις ὄντα δεῖ εἶναι πίθηκον → in Rome we do as the Romans do | when in Rome, do as the Romans do | when in Rome, do as the Romans | when in Rome, do like the Romans do | when in Rome | being among monkeys one has to be a monkey
Russian > Greek
μάλα, ἐπισταδόν, ἀπό σπουδῆς, ἐπιμελῶς, ἐνδυκέως, ἐρρωμένως, ἐπιτηδείως, ἐπιτηδέως, ἐξεπίτηδες, συντόνως, ἐντεταμένως, ἀραρότως, συντεταμένως, ἐκτενῶς, ἐκτενέως, ἐν ἐκτενείᾳ, ἐσπευσμένως, εὐτόνως, νειόθεν, φιλοπόνως, προθύμως, σπουδαίως, μεγαλωστί