en_tn/gen/49/22.md

Joseph is a fruitful bough

Here "Joseph" is a metonym that stands for his descendants. Jacob speaks about them as if they were a tree branch that produces a lot of fruit. This emphasizes that they will greatly increase in number. Alternate translation: "The descendants of Joseph are a fruitful bough" (See: rc://en/ta/man/jit/figs-metonymy and rc://en/ta/man/jit/figs-metaphor)

bough

a main branch of a tree

whose branches climb over the wall

Branches that grow and extend over a wall are spoken of as if they were climbing. (See: rc://en/ta/man/jit/figs-metaphor)