Explanation:

- "Cryptic" means something that is mysterious or difficult to understand.

- Definite (Option 4): This means something that is clear and unambiguous. It's the most appropriate antonym for "cryptic," as it represents clarity and certainty.

- Cloudy (Option 1): This suggests something that is unclear or vague, similar to cryptic.

- Mystical (Option 2): This implies something magical or mysterious, aligning more closely with cryptic than opposing it.

- Fuzzy (Option 3): This refers to lack of clarity or precision, much like cryptic.