The Etymology Lookup plugin for Obsidian provides a quick way to look up the etymology of English words directly from your notes. By fetching results from the Online Etymology Dictionary, it allows users to explore the history and origin of words. This plugin is especially beneficial for ESL learners, students in various fields of study like law, medicine, and linguistics, and anyone interested in the roots of the English language. Users can run the plugin through the ribbon menu, command palette, or right-click menu for easy access.