Final answer:
Dyspnea is the term that means difficulty breathing, in contrast to bradypnea (slow breathing) and eupnea (normal breathing).
Step-by-step explanation:
The term that denotes difficulty in breathing is dyspnea. Other terms related to breathing but not indicative of difficulty include bradypnea, which refers to abnormally slow breathing, and eupnea, which describes normal, unlabored respiration that occurs at rest and does not require conscious thought. Dyspnea can be experienced in various conditions, such as during an asthma attack, lung diseases like pneumonia, or even during normal situations like the latter stages of pregnancy when the growing uterus puts pressure on the diaphragm.