ἁγνιστής
From LSJ
πείθεται πᾶς ἥδιον ἢ βιάζεται (Dio Cassius, Historiae Romanae 8.36.3) → it's always more pleasant to be persuaded than to be forced
English (LSJ)
ἁγνιστοῦ, ὁ, purifier, Glossaria.
Spanish (DGE)
-οῦ, ὁ purificador, Gloss.2.216.
Greek (Liddell-Scott)
ἁγνιστής: -οῦ, ὁ, ὁ καθαρίζων, ὡς τὸ ἁγνίτης, Γλωσσ.