The crossword solution for the term 'SWEET SUFFIX' is OSE, which is a three-letter suffix that is commonly used to form adjectives. It is derived from the Latin word 'osus, ' which means 'full of, ' and is often used to describe something that is SWEET or full of sweetness. For example, the word 'lucose' is formed by adding the suffix 'ose' to the root word 'luc, ' which means 'LIGHT.' This creates the adjective 'lucose, ' which means 'SWEET' or 'full of sweetness.'