1)
What is the meaning of "v'Sa'ar"?
1.
Rashi: It is to turn in a circle, like "uva'Mechugah Yesa'arehu" (Yeshayah 44:13).
2.
Rashi citing Targum Yonasan: Va'Yischar (Lev Yitzchak
2)
What is Mayan Mei Nefto'ach?
1.
Radak: This is what Chachamim called Ein Eitam (refer to 13:8:1:1).
3)
To which direction does the border go?
1.
Rashi: It goes to the north and widens until the cities of Har Efron, and envelops Ba'alah on the north.
4)
Why does it say "Hi Kiryas Ye'arim"?
1.
Malbim: There was another Ba'alah in the south (verse 29), it is Balah that was given to Shimon (19:3). This is why Kiryas Ye'arim is called Ba'alei Yehudah (Shmuel 2 6:2).