The antonyms for the word "trans-posing" are "maintaining," "keeping," and "preserving." When we transpose something, we change its position or order, which means that the opposite of transposing is to keep things in their original position or order. For instance, if we transpose the first and second lines of a poem to create a different version, the antonym would be to maintain the same set of lines in their original order. Similarly, if we transpose a piece of music from one key to another, the antonym would be preserving it in its original key. Thus, understanding antonyms can help us to describe the opposite of any given word, including "trans-posing.