Here the word "nations" refers to their armies. AT: "I will gather armies from many nations that will beat against you like the waves in the raging sea" (See: [[rc://en/ta/man/translate/figs-metonymy]] and [[rc://en/ta/man/translate/figs-simile]])
Yahweh speaks of how he will cause Tyre to be completely destroyed. AT: "I will cause the armies to completely destroy the city, and they will leave nothing there" (See: [[rc://en/ta/man/translate/figs-simile]])