1)
What tense is "Nish'ol Nish'al"?
1.
Radak: It is Makor Shalem (like an infinitive, with the initial Nun) from the Nif'al Binyan. He asked permission for himself to go (as if he borrowed himself). This is like "Nish'alti Min ha'Melech" (Nechemyah 13:6).
2)
What is the meaning of "me'Imadi"?
1.
Radak: He asked permission from me. He did not go without permission.
