The people is greater, in number and strength and valour. Up to heaven, i.e. to a great height. A common hyperbole, as Genesis 11:4 Psalms 107:26. The Anakims; the children of Anak or Enak. See Judges 1:10,20.
Related Commentaries of Deuteronomy 1:28
Deuteronomy 1:28
28 Whither shall we go up? our brethren have discouragedg our heart, saying, The people is greater and taller than we; the cities are great and walled up to heaven; and moreover we have seen the sons of the Anakims there.