Berean Study Bible
For they were all so terrified that Peter did not know what else to say.

King James Bible
For he wist not what to say; for they were sore afraid.

American Standard Version
For he knew not what to answer; for they became sore afraid.

Darby Bible Translation
For he knew not what he should say, for they were filled with fear.

Douay-Rheims Bible
For he knew not what he said: for they were struck with fear.

English Revised Version
For he wist not what to answer; for they became sore afraid.

Young's Literal Translation
for he was not knowing what he might say, for they were greatly afraid.