Imprisonment adjectives are listed in this post. Each word below can often be found in front of the noun imprisonment in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing IMPRISONMENT.
actual, arbitrary, brief, close, continued, cruel, eternal, false, final
first, former, further, harsh, hopeless, illegal, immediate, indefinite, last
lifelong, long, mass, only, own, painful, perpetual, political, possible
present, prolonged, protracted, recent, rigorous, roman, second, severe, short
simple, solitary, subsequent, such, tedious, temporary, term, unjust, unlawful
virtual, voluntary, wrongful, year
Hope this word list had the adjective used with imprisonment you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.