The Hebrew verb ba'ar means to make distinct, to make plain, to inscribe clearly, or to explain. It conveys the idea of making something unmistakably clear — writing or speaking in such a way that there can be no misunderstanding.
In Deuteronomy 1:5, Moses 'began to expound this law' — the verb ba'ar introduces the entire book of Deuteronomy as a clarifying restatement of God's covenant. The implication: God's law is not obscure but meant to be understood.
Habakkuk 2:2 contains the famous divine command to 'write down the revelation and make it plain on tablets so that a herald may run with it.' God's truth is meant to be legible, communicable, and urgently proclaimed.