Lexical Definition

‎προσαπειλέω‎ prosapeiléō (pros-ap-i-leh'-o) to threaten further ^G:V
from ‎πρός‎ and ‎ἀπειλέω‎

i.

• to menace additionally

Abbott-Smith

** προσ-απειλέω, -ῶ, [in LXX: Si 13:3 א*;]
to threaten further: Ac 4:21.†

Abbott-Smith References

Liddell-Scott-Jones

προσαπειλέω-ειλέω, τινι

threaten besides, Test. cited in [Refs 4th c.BC+]:—passive, variant in [LXX]