Summary: The Latin root word *terr* means "earth, land." This Latin root is the word origin of a good number of English vocabulary words, including [*terr*]ain, [*terr*]arium, and Medi[*terr*]anean. The Latin root word *terr* is easily recalled through the English word [*terr*]ain, for the [*terr*]ain of an area is what the "earth" or "land" is like there.
