conventional
From LSJ
ὁ δὲ πείσεται εἰς ἀγαθόν περ → he will obey you to his profit, he will obey you for his own good end
English > Greek (Woodhouse)
adjective
customary: P. and V. συνήθης, νόμιμος.
does this theory please you better, that names are merely conventional symbols: P. ἢ ὅδε μᾶλλον ἀρέσκει ὁ τρόπος… τὸ συνθήματα εἶναι τὰ ὀνόματα (Plato, Orat. 433E).