ἱερᾶσθαι
From LSJ
ἑτέρως ἠδύνατο βέλτιον ἢ ὡς νῦν ἔχει κατεσκευάσθαι → otherwise they could have been constructed better than they are now (Galen, On the use of parts of the body 4.143.1 Kühn)
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].