What did the Spies mean when they said "Lo Nuchal La'alkos el ha'Am"?
Ramban: They meant that it would be impossible to attack them even if they were to come and fight them in the field, how much more so to fight them in their fortified cities.
What are the connotations of "Ki Chazak Hu Mimenu"?
Rashi: They were actually claiming that the Cana'anim were stronger than Hashem (Kevayachol)! 1
Targum Onkelos and Targum Yonasan: They were simply stating that the Cana'anim were stronger than them (and it was therefore impossible to defeat them).
What does "Betzuros" mean?