English Reference
Noun

insufficiency

n. C / U
C1 Advanced US /ˌɪnsəˈfɪʃənˌsi/ UK /ɪnsəfˈɪʃənsi/ in·suf·fi·cien·cy UK spelling insufficiencies

n.a lack of enough of something that is needed. It is often used in medical or technical contexts to describe a failure to provide what is necessary.

n.a state of being insufficient or inadequate for a specific purpose. Frequently used in medical terminology to describe the failure of an organ or system to perform its required function.


SIMPLE

The doctor diagnosed heart insufficiency after the test.

CONTEXTUAL

The project failed because of a lack of funding, which led to a severe insufficiency of skilled labor.

COMPLEX

While the initial proposal was ambitious, the committee pointed out a critical insufficiency in the data, suggesting that the results were not statistically significant enough to justify the investment.

But unlike with vitamin and mineral deficiencies, which can cause distinct negative health effects, “we don’t know the physiological effects of polyphenol insufficiency on health.

The Guardian· 10 Sept 2026
This entry
Level C1 · Advanced
Frequency Occasional
Updated