These two phrases mean basically the same thing. AT: "the things that I have planned will surely happen" (See: [[rc://en/ta/man/translate/figs-parallelism]])
Breaking represents defeating. AT: "I will defeat the Assyrian in my land" or "I will cause the Assyrian in my land to be defeated" (See: [[rc://en/ta/man/translate/figs-metaphor]])
This represents the Assyrian king and his army. AT: "the king of Assyria and his army" or "the Assyrian army" (See: [[rc://en/ta/man/translate/figs-synecdoche]])
# trample him underfoot
This represents completely defeating him. (See: [[rc://en/ta/man/translate/figs-metaphor]])
# Then his yoke will be lifted from off them and his burden from off their shoulder
This can be expressed with an active verb. AT: "Then I will lift his yoke from them and his burden from their shoulder" (See: [[rc://en/ta/man/translate/figs-activepassive]])
# Then his yoke will be lifted from off them and his burden from off their shoulder
These two phrases mean basically the same thing. Lifting the yoke and burden represents setting people free from slavery. AT: "Then I will set the Israelites free from slavery to Assyria like removing a heavy burden from their shoulder" (See: [[rc://en/ta/man/translate/figs-parallelism]] and [[rc://en/ta/man/translate/figs-metaphor]])
# his yoke ... his burden
The word "his" refers to Assyria.
# from off them ... from off their shoulder
The words "them" and "their" refer to the people of Israel.