Imposing upon refers to forcing someone to do something or placing a burden on them. The antonyms or opposite words for this phrase include terms like freeing, liberating, and releasing. If you free someone from a burden, you take off something that might have been imposing upon them. The opposite phrases also include terms like allowing, permitting, and facilitating. These words suggest that someone is given the opportunity to do something on their own terms, rather than being forced into compliance. By avoiding the use of words like 'impose upon,' we can create more positive and enabling language when communicating with others.