Shofar (שופר). A 'trumpet' made of a ram's horn. The word is closely related to  'shafar' (beautiful or comely) from the Akkadian 'sapparu' (a fallow deer). When blown properly you will know why this description is so apt, and why it was variously used in battle; as a call to repentance; and to herald important news and events. It's now sounded in the synagogue during Rosh Hashanah and at the end of Yom Kippur.