A grasshopper is a large, straight-winged insect with long, jointed back legs that give it the ability to jump a long way. Here it can only drag itself because it has gotten old and weak. (See: [[rc://en/ta/man/translate/translate-unknown]])
The abstract noun "desires" can be stated as a verb. Alternate translation: "when people no longer desire what they once did naturally" (See: [[rc://en/ta/man/translate/figs-abstractnouns]])
This refers to death. Alternate translation: "Then man goes to the place of the dead forever" or "Then a person dies and never returns to life" (See: [[rc://en/ta/man/translate/figs-euphemism]])
Possible meanings are 1) that mourners go down the streets to attend a funeral, or 2) that mourners go down the streets to the house of the person who is about to die.