1)
What is "Musar"?
1.
Radak: It is Mitzvos Bein Adam l'Chavero.
2.
Malbim: They are Mitzvos that Musar (ethics) and intellect obligate.
2)
What are "Devarai"?
1.
Radak: They are the other Mitzvos.
2.
Malbim: It is what I said about the Mitzvos of intellect in Aseres ha'Dibros. (You cast them in back of yourself.)
