en_tn/deu/20/20.md

you know are not trees for food

"you know are not trees that grow fruit to eat"

siege works

These are tools and structures, such as ladders and towers, that are needed to lay siege to a city.

until it falls

This is an idiom. Alternate translation: "until the people of the city lose the war" (See: rc://en/ta/man/translate/figs-idiom)

it falls

Here "it" refers to the city which represents the people of the city. (See: rc://en/ta/man/translate/figs-metonymy)