Today, the word overt refers to something done in a transparent manner, but in Middle English, it had more literal definitions of "open" or "uncovered". The adjective is borrowed from Middle French ouvert - which is still extant in Modern French as meaning "open" - and that comes from Old French uvert and Latin aperire, a verb for "open" that is also the source of words like overture, aperture, and aperitif. Finally, that derives from Proto-Italic hepo and the Proto-Indo-European reconstruction hwer, meaning "to cover" or "shut" (this turned into its antonym through a connotation of "uncover". Descendants include discover, curfew, garage, warrant, guarantee, and more). According to Google NGrams, usage of the word overt peaked in 1974 and has been on a steady decline since then.
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.