'Smooth' in the Bible

from the smooth mountain, which rises toward Seir, as far as Baal-Gad in the valley of Lebanon, at the foot of mount Hermon; and he took all their kings, and smote them, and put them to death.

And these are the kings of the land whom Joshua and the children of Israel smote on this side the Jordan on the west, from Baal-Gad in the valley of Lebanon as far as the smooth mountain, which rises toward Seir. And Joshua gave it to the tribes of Israel for a possession according to their divisions,