Ansomnia is characterized by an inability to do what?

Ansomnia refers specifically to the loss or inability to smell. This condition affects the olfactory system, impairing the ability to detect odors. Individuals with ansomnia may find that they cannot perceive scents, which can impact taste and overall quality of life since smell plays a significant role in flavor perception and emotional responses to various smells.

While the terms for the other options relate to different types of sensory or functional impairments—such as blindness for seeing, aphasia for speaking, and insomnia for sleeping—they are distinct conditions unrelated to ansomnia. The focus on the olfactory aspect clearly defines ansomnia and underscores the importance of the sense of smell in daily experiences.