The term 'Italian Suffix' refers to two common suffixes used in the Italian language. The first is 'etta, ' which is a diminutive suffix used to indicate smallness or endearment. For example, the word 'CASA' (house) can become 'casetta' (little house). The second is 'ino, ' which is a suffix used to indicate something of small size or importance. For example, the word 'cavallo' (horse) can become 'cavallino' (pony). Both suffixes are commonly used in Italian to add a sense of familiarity and endearment to words.