RobH_en_tn/deu/12/29.md

cuts off the nations

Yahweh destroying the people groups in Canaan is spoken of as if he were cutting them off, as one would cut a piece of cloth or cut a branch from a tree. (See: rc://en/ta/man/translate/figs-metaphor)

the nations

Here "nations" represents the people living in Canaan. (See: rc://en/ta/man/translate/figs-metonymy)

when you go in to dispossess them, and you dispossess them

"when you take everything from them"