Riddle adjectives are listed in this post. Each word below can often be found in front of the noun riddle in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing RIDDLE.
dark, eternal, famous
first, great, hopeless
inexplicable, insoluble, new
old, own, psychological
strange, unsolved, whole
Hope this word list had the adjective used with riddle you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.
brain whacking