πολυτίμως

From LSJ

ἀλλ᾽ ἀμφὶ τοῖς σφαλεῖσι μὴ 'ξ ἑκουσίας ὀργὴ πέπειρα → to those who err in judgment, not in will, anger is gentle | men's wrath is softened toward those who have erred unwittingly

Source

Russian (Dvoretsky)

πολυτίμως: (ῑ) с великим усердием, с большой тщательностью (διαταφρεύειν Polyb.).