Vocabulary Builder #1: A is for Abyss

Abyss. Pronounced uh-biss. The very deep parts of the ocean.

Word origin and history [link is to online dictionary]:
late 14c., earlier abime (c.1300), from L.L. abyssus "bottomless pit," from Gk. abyssos (limne) "bottomless (pool)," from a- "without" (see a- (2)) + byssos "bottom," possibly related to bathos "depth."