"De tract" is a term that doesn't have an established meaning or definition. However, if we were to consider it as a phrase instead of a single word, then we could suggest some antonyms for it.
"De" is a Latin prefix that means "to reverse" or "to remove," while "tract" refers to an area or expanse of land. Therefore, some antonyms for "de tract" could include "to add" or "to include." Other antonyms for "de" could be "to keep" or "to retain," while for "tract," we could use "to reduce" or "to diminish."
In any case, it's important to note that "de tract" isn't a common term, so it's unlikely that we would encounter it often in everyday language.