The crossword solution for the term 'Moisten, as a roast' is 'BASTE', which is a five-letter word. Basting is a cooking technique used to keep food moist and flavorful while it is being cooked. It involves brushing or spooning liquid over the food during the cooking process. This liquid can be anything from melted butter, oil, or stock, to wine, beer, or other liquids. Basting helps to keep the food from drying out and adds flavor.