al-Hakīm

The One who is Most Knowing. The One who possesses the quality of discrimination between right and wrong and who is free from error or misunderstanding.

The One who has perfect wisdom. The One whose wisdom turns mankind back from wrongdoing. The One who is qualified to judge the worth of all things.

From the root h-k-m which has the following classical Arabic connotations:

to prevent or restrain from wrongdoing or corruption
to turn someone back from wrongdoing or ignorance
to be wise, knowing the true nature of things
to pass judgment, to decide, pass a verdict
to judge and pass sentence

This name is used in the Qur'ān. For example, see 2:32

The words hakam and hakīm both arise from the same h-k-m root, but hakam is a verbal noun which emphasizes the delivery of justice, while hakīm is a noun which indicates the essential nature of the possessor of wisdom.