Coherent, ultimately from the
Latin co- ("together") and haerēre ("to stick or cling")
Catercorner: Cater derives from
the Middle French noun quatre (or catre), which means "four." English
speakers adopted the word to refer to the four-dotted side of a die—a side
important in several winning combinations in dice games. Perhaps because the
four spots on a die can suggest an X, cater eventually came to be used
dialectically with the meaning "diagonal" or "diagonally."
This cater was combined with corner to form catercorner.