This document provides etymologies and definitions for various words. It traces words like stamina to Latin roots, taboo to Polynesian languages, and clue to mythology. It explains engineer comes from Latin for ingenuity, while serendipity was coined based on a Persian tale. Disaster combines Greek roots for bad and star. Other words traced include mortgage from French for death pledge, peninsula from Latin roots, and muscle from a resemblance to mice. Devil, guess, abandon, and bachelor are also explored for their origins and historical meanings. Apology originally meant defense rather than regret. Malaria combines Latin for bad air, and nostalgia combines Greek roots for returning home and pain.