We've covered entomology and etiology, now onto two more similar-sounding fields: epidemiology and eschatology! Eschatology first. For those unaware, this field of study is concerned with studying the end of the world and judgment on a theological and personal level. The word comes from the Greek word eskhatos, meaning "last", and -ology, being the study of things. Therefore, eschatology is "the study of the last". Eskhatos can be reconstructed to a Proto-Indo-European root sounding like eghskatos, which reduces to ex, just meaning "out". Moving on now to epidemiology, the study of the spread of diseases. Eliminating the -ology, the root is Ancient Greek epidemia, meaning "among the people", because diseases spread among the people (also the source of epidemic, through French epidemie). This is composed of two parts: epi-, meaning "among" (from PIE opi, "near"), and demos, meaning "people" (from PIE damo, "division"). Stay tuned for more weird sciences.
Adam Aleksic, a rising sophomore studying linguistics and government at Harvard University, has been described as the internet's sixth most famous etymologist. He also has disturbing interests in politics, vexillology, geography, board games, conlanging, and law.