1)
What is the meaning of "Nechitim"?
1.
Rashi: They are camping. Radak - this is like "Hanchas Hashem Giborecha" (Yo'el 4:11). The Targum of va'Yered (Bereishis 12:10) is 'u'Nechas'. I.e. they descend and camp. They camped in a low place to hide.
2.
Radak citing Targum Yonasan: Were covered.
