The term "cart off" refers to the action of removing or carrying something away. Some of the antonyms for this particular phrase include "bring in," "keep in place," "leave behind," and "put in." If someone prefers not to cart something off, they may choose to keep it in its original location. Alternatively, they could choose to bring something in, which would be the opposite of carting something off. When someone decides to leave something behind, they are also doing the opposite of carting it off. Finally, if someone opts to put something in a certain place, they are also not carting it off.