ὠφελητικός
From LSJ
τότε λαλήσει πρὸς αὐτοὺς ἐν ὀργῇ αὐτοῦ καὶ ἐν τῷ θυμῷ αὐτοῦ ταράξει αὐτούς → then shall he speak to them in his anger, and trouble them in his fury
English (LSJ)
ή, όν,
A helpful, useful, Ph.1.14, Fr.55 H., Arr. Epict.2.10.23, Aristid.Quint.2.9, Dam.Isid.296.
Greek (Liddell-Scott)
ὠφελητικός: -ή, -όν, βοηθητικός, χρήσιμος, Φίλων 1. 120.