The term ASTHMATIC can be summarized by the crossword solution WHEEZY, which is a six-letter word. Asthma is a chronic lung disease that causes difficulty breathing due to inflammation and narrowing of the airways. People with asthma often experience wheezing, which is a whistling or squeaky sound when breathing. Wheezing is caused by the narrowing of the airways, which makes it difficult for air to move in and out of the lungs.