Lexical Definition

‎προέπω‎ proépō (pro-ep'-o) to predict ^G:V
from ‎πρό‎ and ‎ἔπω‎

forewarn, say (speak, tell) before.

• to say already, to predict

Abbott-Smith

** προ-εῖπον, 2 aor. from unused Pres. (v.s. εἶπον, and pf., -είρηκα (III Mac 6:35*), pass., -είρημαι (II Mac 2:32, III Mac 1:26, al.),
1. to say before: Ga 1:9, I Th 4:6 (on the form -αμεν, v. WH, App., 164), He 4:7; seq. ὅτι, II Co 7:3 13:2, Ga 5:21; of prophecy, Mt 24:25, Mk 13:23, Ac 1:16, Ro 9:29, II Pe 3:2, Ju 17.
2. to proclaim publicly, declare openly or plainly (cl.): so R, mg., in II Co 13:2, Ga 5:21, I Th 4:6 (cf. προλέγω; but v. supr., and cf. M, Th., 38).†

Abbott-Smith References

Liddell-Scott-Jones

προέπω

(also -εῖπα[Refs 2nd c.BC+]aorist with no present in use, προλέγω and προαγορεύω being used, participle προειπών, infinitive προειπεῖν:— foretell, [Refs 5th c.BC+]; premise, τοῦτο προειπόντα ἐπειπεῖν τὰ ἔμπροσθεν [Refs 4th c.BC+]

__II proclaim or declare publicly, ἀλλήλοισι πόλεμον π. [Refs 5th c.BC+]; νικητήρια ταῖς τάξεσι[Refs 5th c.BC+]; π. τινὶ φόνου make proclamation of murder against him, [Refs 5th c.BC+]; ὀνυμάξει αὐτὸν προειπὼν τρῖς ἁμέρας giving notice of three days (within which he must answer the call), [Refs]; ἐν ἡμέραις πέντε ἀφ᾽ ἧς ἂν ἀλλήλοις προείπωσιν [Refs 1st c.AD+]
__III with infinitive, order or command before, πρό οἱ εἴπομεν.., μήτ᾽ αὐτὸν κτείνειν [προέπω αὐτῷ μὴ δημηγορεῖν 4th c.BC: Aeschines Orator 1.3; π. τοῖς καδεσταῖς ἀλλύεθθαι “Leg.Gort.” 2.28 ">Refs 8th c.BC+]: with accusative et infinitive, π. σῖτον ἐσάγειν τὸν βουλόμενον [Refs 5th c.BC+]; π. αὐτῷ δήσειν threatened him that.., [Refs 5th c.BC+]
__III.2 enjoin, with accusative, π. Λυδοῖσι τὰ ὁ Κροῖσος ὑπετίθετο [Refs 5th c.BC+]