'Acquainted' in the Bible

You scrutinize my path and my lying down,And are intimately acquainted with all my ways.

He was despised and forsaken of men,A man of sorrows and acquainted with grief;And like one from whom men hide their faceHe was despised, and we did not esteem Him.

This man had been instructed in the way of the Lord; and being fervent in spirit, he was speaking and teaching accurately the things concerning Jesus, being acquainted only with the baptism of John;

Then three years later I went up to Jerusalem to become acquainted with Cephas, and stayed with him fifteen days.