en_obs-tn/content/14/05.md

they came back

They returned to where the rest of the Israelites were waiting, just outside the border of Canaan.

The cities are very strong

The cities had strong walls around them, so it would be very difficult for the Israelites to attack them.

the people are giants

This could be translated as, "the people are like giants compared to us!" or, "the people are much taller and stronger than we are!"