The best way to start thinking deeper about dictionaries is to surf through the entries of Merriam-Webster. Sites for commercial lexicons are free and open to the public. Let yourself be surprised by what you find. Learn about the role and history of dictionaries from this conversation with Ilan Stavans, the educator of this TED-Ed lesson. Vice has an article on language and immigration that is useful to appreciate how people foster linguistic change. Curious about Spanglish? This New York Times article has more information about the hybrid tongue born from the intersection between English and Spanish. These are some suggestions that will help you think more broadly about the life of words.