Strong's G1127 — γρηγορεύω (verb)
gregoreuo (gray-gor-yoo'-o) v.
1. to keep awake, i.e. watch
{literally or figuratively}
[from G1453]
KJV: be vigilant, wake, (be) watch(-ful) 
Root(s): G1453 
Hebrew root: ἐγείρω
Occurrences: 22