mere-þyssa Posted on July 1, 2025 by Hana Videen mere-þyssa, m.n: a sea-rusher, a ship. (MEH-ruh-THUE-sa / ˈmɛ-rə-ˌθys-sa) Saw-fish (Serra) getting ready to race a ship in a Physiologus; Germany, early 14th century; Bayerische Staatsbibliothek, Clm 3206, f. 150v. [digitale-sammlungen.de]