noun

deficiency

deficiency, shortage, flaw

A vitamin C deficiency can cause illness.

A vitamin C deficiency can cause illness.

The report highlighted deficiencies in the system.

The report highlighted deficiencies in the system.

a deficiency of ((sth.)) a lack of a substance He has a deficiency of iron.

a deficiency in ((sth.)) a lack or flaw in something There is a deficiency in their security measures.

Synonyms: shortage, lack, inadequacy; Antonyms: surplus, abundance

From Latin 'deficere' (to be wanting), from 'de-' (away) + 'facere' (to do/make). It signifies a 'falling short'.

Think of something being 'de-efficient' – it's not working properly because something is lacking.

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