A horn is a symbol of strength. See how you translated similar words in [1 Samuel 2:1](../02/01.md). Alternate translation: "he will make the leader he has chosen stronger than his enemies" (See: [[rc://en/ta/man/jit/figs-metaphor]])
This speaks of the person that Yahweh chose and empowered for his purposes as if Yahweh had anointed the person with oil. This can be stated in active form. Alternate translation: "the one he has anointed" or "the one he has chosen" (See: [[rc://en/ta/man/jit/figs-metaphor]] and [[rc://en/ta/man/jit/figs-activepassive]])