ἀβελτερεύομαι
From LSJ
ἀσκεῖν περὶ τὰ νοσήματα δύο, ὠφελεῖν ἢ μὴ βλάπτειν → strive, with regard to diseases, for two things — to do good, or to do no harm | as to diseases, make a habit of two things — to help, or at least, to do no harm
English (LSJ)
A play the fool, Epicur.Nat.89G.
Spanish (DGE)
hacer el tonto μάχεταί τινι ... ὡς ... ἀβελτ[ε] ρευομένῳ discute con alguien como si el otro fuera tonto Epicur.Fr.[34] 28.7.