professional
From LSJ
Πενίαν φέρειν οὐ παντός, ἀλλ' ἀνδρὸς σοφοῦ → Perferre inopiam non nisi sapientium est → nicht jeder meistert Armut, nur der weise Mann
adj.
As opposed to lay: Ar. and P. δεινός, P. πεπαιδευμένος. Professional speaker: P. and V. ῥήτωρ, ὁ.