General Information:

Yahweh's parable about the cedar continues.

who were the terror of all the nations

The abstract noun "terror" can be stated as "afraid." And here "nations" represents the people of the nations. Alternate translation: "who made the people of all the nations afraid" (See: rc://en/ta/man/translate/figs-abstractnouns and rc://en/ta/man/translate/figs-metonymy)

"cut the cedar down"

"the foreigners broke the boughs of the cedar"

Boughs are very large branches that grow on trees. Usually, many smaller branches grow on the boughs.

"left the shade of the cedar"