Vine's Expository Dictionary: View Entry
TDNT Reference: 7:196,1014
σείω seíō, si'-o; apparently a primary verb; to rock (vibrate, properly, sideways or to and fro), i.e. (generally) to agitate (in any direction; cause to tremble); figuratively, to throw into a tremor (of fear or concern):—move, quake, shake.
to shake, agitate, cause to tremble
of men, to be thrown into a tremor, to quake for fear
metaph. to agitate the mind
Strong's Number G4579 matches the Greek σείω (seiō),
which occurs 5 times in 5 verses
in the TR Greek.