The term FILLING FULLY can be solved by the crossword solution SATING, which is a six-letter word. Sating is a type of fabric finish that is applied to a material to give it a glossy, lustrous look. It is often used on fabrics such as silk and velvet to give them a smooth, luxurious feel. The process of sating involves applying a thin layer of wax or resin to the fabric, which is then heated to seal it in. This process gives the fabric a full, even coverage and a high sheen.