Breathlessness

There was a breathlessness, an apprehension, a realization that something was wrong, and a sense that things more catastrophic were gestating in the womb of the future.

Along with dust around the home, we breathe in waste from these creatures. Mite droppings contain enzymes called proteases. Enzymes produce chemical reactions in the body. Proteases can cause allergic reactions like breathlessness, coughing or severe asthma attacks.

Climbing eight flights of stairs while the elevator is out of service can easily produce some breathlessness in people whose physical fitness is otherwise not noticeably impaired.

Dickinson's longer lines and use of ampersands ^([Bronski means dashes]) creates a breathlessness that evokes sexual excitement, an urgency that precludes, or at least, overshadows thought.

Since he'd entered the urgent care center, his breathlessness had only gotten worse, even though he'd been sitting quietly.