1)
What is the meaning of "Kumah v'Na'aleh"?
1.
Radak: It is an expression to invigorate, like "Kum Avor" (Yehoshua 1:2), "Kum His'halech ba'Aretz" (Bereishis 3:17).
2.
Malbim: You need not send spies a second time, rather, go immediately. You will not find that the land is bad - "v'Hinei Tovah Me'od."
2)
What is the meaning of "Machshim"?
1.
Rashi: You are being lazy.
2.
Radak: You are silent. You do not act with zealousness.
3)
What is the meaning of "Al Te'altzu"?
1.
Radak: Do not slacken.
4)
Why did they say "Lareshes Es ha'Aretz"?
1.
Malbim: You will not need to fight, only to inherit it (the next verse explains why).