προσήλυτος
From LSJ
μὴ τὴν ὄψιν καλλωπίζου, ἀλλ' ἐν τοῖς ἐπιτηδεύμασιν ἴσθι καλός → Don't beautify your face, but be beautiful in your habits (Thales, in Diog. Laertius 1.37)
English (LSJ)
ον,
A one that has arrived at a place, stranger, sojourner, τῷ προσελθόντι προσηλύτῳ ib.Ex.12.49, al. II one who has come over to Judaism, convert, proselyte, Ph.2.219, Ev.Matt.23.15, Act.Ap. 2.10.