φροντίστρια
From LSJ
τὸ ἀγαθὸν αἱρετόν· τὸ δ' αἱρετὸν ἀρεστόν· τὸ δ' ἀρεστὸν ἐπαινετόν· τὸ δ' ἐπαινετὸν καλόν → what is good is chosen, what is chosen is approved, what is approved is admired, what is admired is beautiful
English (LSJ)
ἡ, fem. of φροντιστής,
A guardian, υἱωνοῦ PLond.3.1164a6 (iii A. D.), cf. BGU1662.4 (ii A. D.).