ἱερᾶσθαι

From LSJ

λέγεις, ἃ δὲ λέγεις ἕνεκα τοῦ λαβεῖν λέγεις → you speak, but you say what you say for the sake of gain (Menander, fr. 776)

Source

Greek > English (Woodhouse Verbs Reversed)

(see also ἱεράομαι): be a priest, be priestess

Lexicon Thucydideum

sacerdotio fungi, to perform priestly duties, 2.2.1, 5.1.1, [pauci codd. few manuscripts ἱερᾶσθαι].