Antonyms for the phrase "conveys impression" would include phrases such as "fails to convey impression," "misrepresents impression," or "obscures impression." Each of these antonyms describe a failure to communicate or a distortion of the intended message or impression. Other antonyms might include phrases such as "overstates impression" or "misinterprets impression," which suggest an exaggeration or misreading of the intended message. Overall, antonyms for "conveys impression" describe a range of situations where communication fails to achieve its intended purpose, whether due to miscommunication, misinterpretation, or intentional distortions.