conventional
From LSJ
Δεῖ τοὺς μὲν εἶναι δυστυχεῖς, τοὺς δ' εὐτυχεῖς → Aliis necesse est bene sit, aliis sit male → Die einen trifft das Unglück, andere das Glück
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).