Here the word "sword" is a metonym for soldiers who attack with swords and is spoken of as if it were a person who eats its victims. Nahum also continues to speak to the people of Nineveh as if they were lions. Alternate translation: "attackers will kill your people with swords" (See: [[rc://en/ta/man/translate/figs-metonymy]] and [[rc://en/ta/man/translate/figs-personification]] and [[rc://en/ta/man/translate/figs-metaphor]])
Yahweh speaks of the people of Nineveh as if they were lions who preyed upon the nations. Possible meanings are 1) the word "prey" is a metonym for the things that they have taken from those upon whom they preyed, and Yahweh speaks of taking those things away from them as if it were cutting off their prey. Alternate translation: "I will take away from your land all the things that you took from others" or 2) Yahweh speaks of the nations whom the people of Nineveh had plundered as if they were Nineveh's prey, and preventing Nineveh from plundering any more nations as if he were cutting off their prey. Alternate translation: "I will stop you from preying upon any other nation" (See: [[rc://en/ta/man/translate/figs-metaphor]] and [[rc://en/ta/man/translate/figs-metonymy]])
This likely refers to the messengers that the Assyrians sent out to other nations to demand surrender or payment of tribute. This can be stated in active form. Alternate translation: "no one will ever hear the voices of your messengers again" (See: [[rc://en/ta/man/translate/figs-activepassive]])