'Acquainted' in the Bible

Thou searchest out my path and my lying down, and art acquainted with all my ways;

Be well acquainted with the appearance of thy flocks; look well to thy herds:

He is despised and left alone of men; a man of sorrows, and acquainted with grief, and like one from whom men hide their faces; despised, and we esteemed him not.

youths in whom was no blemish, and of goodly countenance, and skilful in all wisdom, and acquainted with knowledge, and understanding science, and such as had ability in them to stand in the king's palace, and whom they might teach the learning and the language of the Chaldeans.