'Wist' in the Bible

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

And when he returned, he found them asleep again, (for their eyes were heavy,) neither wist they what to answer him.

And he said unto them, How is it that ye sought me? wist ye not that I must be about my Father's business?

And he that was healed wist not who it was: for Jesus had conveyed himself away, a multitude being in that place.

And he went out, and followed him; and wist not that it was true which was done by the angel; but thought he saw a vision.

Then said Paul, I wist not, brethren, that he was the high priest: for it is written, Thou shalt not speak evil of the ruler of thy people.