Impossibility adjectives are listed in this post. Each word below can often be found in front of the noun impossibility in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing IMPOSSIBILITY.
absolute, actual, alleged, apparent, complete, consequent, economic, entire
evident, financial, fundamental, historical, human, inherent, intrinsic, laughable
legal, logical, manifest, mathematical, mere, metaphysical, moral, natural
near, obvious, own, physical, political, practical, priori, psychological
pure, real, same, scientific, sheer, simple, such, technical
theoretical, total, ultimate, utter, very, virtual
Hope this word list had the adjective used with impossibility you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.