beast (n.) Look up beast at Dictionary.com
c. 1200, from Old French beste "animal, wild beast," figuratively "fool, idiot" (11c., Modern French bête), from Vulgar Latin *besta, from Latin bestia "beast, wild animal," which is of unknown origin. Used to translate Latin animal. Replaced Old English deor (see deer) as the generic word for "wild creature," only to be ousted 16c. by animal. Of persons felt to be animal-like in various senses from early 13c. Of the figure in the Christian apocalypse story from late 14c.