Lexical Definition

‎διαγρηγορέω‎ diagrēgoréō (dee-ag-ray-gor-eh'-o) to wake ^G:V
from ‎διά‎ and ‎γρηγορεύω‎

be awake.

• to waken thoroughly

Abbott-Smith

*† δια-γρηγορέω, -ῶ
(a) prop., to remain awake (R, mg.);
(b) to be fully awake (R, txt.): Lk 9:32.†

Abbott-Smith References

Liddell-Scott-Jones

διαγρηγορέω,

start into full wakefulness, [NT]; keep awake, πάσης τῆς νυκτὸς ἐν φροντίσιν καὶ δέει δ. [Refs 2nd c.AD+]

_{LSJ Scripture Refs: Luke.9.32}