Widerpart
From LSJ
τούτων γάρ ὄνομα μόνον κοινόν, ὁ δέ κατά τοὔνομα λόγος τῆς οὐσίας ἕτερος → though they have a common name, the definition corresponding with the name differs for each (Aristotle, Categoriae 1a3-4)
German > Latin
Widerpart, s. Gegner, Gegenpartei. – jmdm. die W. halten, alci resistere, repugnare.