There are several antonyms for the word "de-duces," which means to subtract or take away. The opposite of this word would be to add or include, such as in the case of "augment" or "augmenting." Other antonyms for "de-duces" include "add," "increase," "multiply," and "expand." These words indicate a change in quantity or size, rather than a reduction or subtraction. By understanding antonyms for "de-duces," we can better communicate our intentions to add or subtract when discussing various subjects, such as mathematics, finance, or problem-solving.