The Italian salutation 'CIAO' is a four-letter word that is commonly used as a greeting in Italy and other parts of the world. It is derived from the Venetian language and is believed to have originated in the late 19th century. The literal translation of 'CIAO' is 'HELLO' or 'GOODBYE', but it can also be used to express a variety of emotions, such as surprise, joy, and sorrow. It is a very versatile word and is often used as a casual way to say HELLO or GOODBYE.