1)
Why is there an Aleph and Yud in "Rishonah"?
1.
Radak: The Aleph is from the root, and the Yud is l'Meshech (to draw out the Chirik).
Why is there an Aleph and Yud in "Rishonah"?
Radak: The Aleph is from the root, and the Yud is l'Meshech (to draw out the Chirik).