The term 'Italian Diminutive Suffix' refers to three suffixes commonly used in the Italian language to indicate a diminutive form of a word. These suffixes are 'etta' (4 letters), 'ini' (3 letters) and 'ino' (3 letters). These suffixes are often used to express endearment, smallness, or affection. For example, the Italian word for 'DOG' is 'CANE', but with the diminutive suffix 'ino' it becomes 'CANE-ino' which can be translated as 'little DOG'.