1)
Did Ezra separate men?
1.
Ibn Ezra: No, he and men separated. It means Ezra ha'Kohen v'Anashim; the prefix Vov is omitted. Malbim - Ezra and Roshei ha'Avos stayed in Yerushalayim, separated from the people, who returned to their affairs. Ezra and Roshei ha'Avos stayed to investigate the matter.
2)
What is "Ledaryosh"?
1.
Rashi: It is like Lidrosh. Ibn Ezra - this is a strange word, due to the Yud. The root has four letters. It is a Kaved conjugation, with a Dagesh. It has a Cholem, like "Yasor Yisereni", "Kavo Kivisi."
