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)
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].