"Street dealer" is the first term that comes to mind.

In English it is common to take away a lot of words from the full sentence because people will understand them without certain words being present. This is the case here: FULL SENTENCE: In a short time he had no more trouble with the rats and mice, but instead he slept quite sound every night. To native speakers, the "instead he" would seem repetitive since we know the subject is "he" and that the "but" indicates a change so the "instead" becomes redundant/ useless. So basically "but" acts as a complementary link rather than a contrast.

In English, we say that the "eyes drifted shut" to express and show how the person closed their eyes without actively thinking or wanting to shut them. When you "drift", you do so without doing it forcefully. That is why we have the expression "drifted shut" to indicate that the eyes closed at some point before the person knew. Taboo is something that society prohibits or something that everybody refuses to talk about because the topic is sensitive or highly controversial. I think the sentence you have is trying to show that talking about other people's salaries and wages (the money they get from work) is highly personal so it is considered a "taboo" topic (in western culture at least). Lori Lemon is probably a fictional name used in the book or exam you are using here. Arched, by itself, means something curved. It is a physical description. "Arched away" is a description of motion to show that something/ someone has moved backwards away from something. Hope this helps!