Sure but while studying the etymology of words can do a lot to help you understand them (particularly from a linguistic perspective), its really more important to consider what people mean when they use a word, not where it came from. "Howdy" comes from "How do you do?" and yet nobody treats "Howdy" as a question. If I say "Howdy" to you (which is something I do often), and you answer "Good, how are you," I'm going to give you a weird look.