Strong's Concordance

Original word: διαγρηγορέω
Transliteration: diagrégoreó
Definition (short): awake
Definition (full): to keep awake, to be fully awake

NAS Exhaustive Concordance

Word Origin: from dia and grégoreó
Definition: to keep awake, to be fully awake
NASB Translation: fully awake (1).
NAS Exhaustive Concordance of the Bible with Hebrew-Aramaic and Greek Dictionaries.
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Strong's Exhaustive Concordance

From dia and gregoreuo; to waken thoroughly -- be awake.

see GREEK dia

see GREEK gregoreuo

KJV: But Peter and they that were with him were heavy with sleep: and when they were awake, they saw his glory, and the two men that stood with him.
NASB: Now Peter and his companions had been overcome with sleep; but when they were fully awake, they saw His glory and the two men standing with Him.