Verse Comparison: Mark 9:6
American Standard Version
For he knew not what to answer; for they became sore afraid.
Amplified® Bible
For he did not [really] know what to say, for they were in a violent fright (aghast with dread).
Darby English Version
For he knew not what he should say, for they were filled with fear.
International Standard Version
(Peter didn't know how to respond, for they were terrified.)
King James Version
For he wist not what to say; for they were sore afraid.
Young's Literal Translation
for he was not knowing what he might say, for they were greatly afraid.