The antonyms for the word "hypostatizing" could be words like doubting, questioning, challenging, disputing, or rejecting. Essentially, the term "hypostatizing" means to treat something abstract as a real, tangible thing. So, the opposite of that would be to question the reality or existence of that abstract concept. For example, if someone was hypostatizing the idea of love, they might believe that love is a concrete force that exists in the world. However, someone who is disputing that idea might argue that love is simply an emotion or a social construct. Overall, the antonyms for "hypostatizing" are words that suggest skepticism or doubt about abstract concepts.