'Knew' in the Bible

until there arose a foreign king over Egypt who knew nothing of Joseph.

and Paul desiring that he should accompany him on his journey, took him and circumcised him on account of the Jews in those parts, for they all knew that his father was a Greek.

He had been instructed by word of mouth in the way of the Lord, and, being full of burning zeal, he used to speak and teach accurately the facts about Jesus, though he knew of no baptism but John's.