ἀνθυπούργησις
From LSJ
τούτων γάρ ἑκάτερον κοινῷ ὀνόματι προσαγορεύεται ζῷον, καί ὁ λόγος δέ τῆς οὐσίας ὁ αὐτός → and these are univocally so named, inasmuch as not only the name, but also the definition, is the same in both cases (Aristotle, Categoriae 1a8-10)
English (LSJ)
εως, ἡ,
A returning of a kindness, Hsch.
German (Pape)
[Seite 236] ἡ, Gegengefälligkeit, VLL.