impairment
[C/U] Both
This term carries a clinical and formal weight, often used in medical, legal, or insurance contexts to describe a permanent or long-term deficit. It focuses on the structural or functional limitation itself rather than the social consequences of that limitation. While a disability refers to the resulting inability to perform a task, an impairment is the specific physiological or psychological cause. It is a neutral, descriptive word that avoids the emotional baggage of older terms while maintaining a precise, diagnostic tone.
Countable when referring to a specific medical condition or a listed deficit in a report. Uncountable when discussing the general state of being diminished or the process of degradation.