ekthambeō

(Translation from NRSV with a few modifications for a more literal meaning)

Mark

9: 15	When the whole crowd saw him, they were struck with stupor (ekthambeō), and they ran forward to greet him.
14: 33	He took with him Peter and James and John, and began to be struck with stupor (ekthambeō) and became agitated.
16: 5	As they entered the tomb, they saw a young man, dressed in a white robe, sitting on the right side; and they were struck with stupor (ekthambeō).
16: 6	But he said to them, "Do not be struck with stupor (ekthambeō); you are looking for Jesus of Nazareth, who was crucified. He has been raised; he is not here. Look, there is the place they laid him.