A "dark saying" refers to a proverb or phrase that is unclear or mysterious in its meaning, often requiring interpretation or explanation. Synonyms for this term include enigma, puzzle, riddle, mystery, and paradox. An enigma is a puzzling or difficult situation or person. A puzzle is a problem that requires clever thinking to solve. A riddle is a question or statement that requires an answer or solution. A mystery is something that is unknown or inexplicable. Finally, a paradox is a statement that contradicts itself yet may still be true. These synonyms can help to convey the same sense of intrigue and complexity as a "dark saying".