The term 'very valuable' can be summarized by two crossword solutions: 'PRICELESS' (9 letters) and 'worthagreatdeal' (15 letters). 'PRICELESS' is an adjective that is used to describe something that is invaluable, or having a value that cannot be measured. It is often used to describe something that is irreplaceable or of great sentimental value. 'Worthagreatdeal' is an adjective that is used to describe something that has a high monetary value or is of great importance. It is often used to describe something that is highly sought after or of great worth.