Deficiency vs Impairment
When to use each in English, with meaning, register, and examples.
| Deficiency | Impairment | |
|---|---|---|
| Meaning | Not having enough of something you need. | The condition of having a weakness or loss of ability. |
| Register | formal | formal |
| CEFR level | C1 | - |
| Part of speech | noun | |
| Usage notes | Used in medical, scientific, or formal contexts. Avoid using in casual conversation. It's appropriate when discussing health issues like vitamin deficiency. | Used in medical and legal contexts to refer to loss of function or ability. Avoid in casual conversation. |
Frequently asked questions: Deficiency vs Impairment
What's the difference between "Deficiency" and "Impairment"?
"Deficiency" means: Not having enough of something you need. "Impairment" means: The condition of having a weakness or loss of ability.
When should I use "Deficiency" and "Impairment"?
"Deficiency" is formal; "Impairment" is formal.