The crossword solution for the term 'determine the worth of' is 'APPRAISE, ' which is an 8-letter word. Appraising is a process of assessing the value of something, such as a property or an item of personal property. It is usually done by a professional appraiser who has the knowledge and experience to accurately assess the worth of the item in question. Appraisals are often used in real estate transactions, insurance claims, and other financial matters.