Hollowing out is a process of removing material from an object or area to create a cavity or hole. The crossword solutions for the term hollow out are DIG (3 letters), TUNNEL (6 letters), QUARRY (6 letters), MINE (4 letters), BURROW (6 letters), BORE (4 letters), CAVE (4 letters), REAM (4 letters), DEEPEN (6 letters), EXHUME (6 letters), CONCAVE (7 letters), and TURNOVER (8 letters). These words all describe different ways of removing material from an object or area to create a cavity or hole. Digging involves using a shovel or other tool to remove material from the ground, while tunneling involves digging a long, narrow passage through solid material. Quarrying is the process of extracting stone or other materials from an open-pit MINE, and mining is the process of extracting valuable minerals from the earth. Burrowing is the process of digging a hole or TUNNEL in the ground, while boring is the process of drilling a hole in a solid material. Caving is the process of creating a large, underground chamber, while reaming is the process of enlarging a hole by removing material from its sides. Deepening is the process of making a hole or cavity deeper, while exhuming is the process of digging up something that has been buried. Concaving is the process of making a surface or object curved inward, and TURNOVER is the process of turning something over. All of these processes involve removing material from an object or area to create a cavity or hole, which is the definition of hollowing out.