ENGLISH WORD FILE NO. 00209 · Core CSAT & TOEIC Vocabulary
deficient
adj.
US/dɪˈfɪʃənt/
UK/dɪˈfɪʃənt/
CSAT Frequency30/100
TOEIC Frequency37/100
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Meanings of deficient
1adjective
Lacking something essential; not having enough of a required quality or element.
A diet deficient in vitamin C can cause health problems.
A diet deficient in vitamin C can cause health problems.
The report was found to be deficient in several key areas.
The report was found to be deficient in several key areas.
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Derivatives of deficient
deficiency
deficiency (noun)
He was diagnosed with an iron deficiency.
He was diagnosed with an iron deficiency.
deficiently
deficiently (adverb)
The building was deficiently insulated for winter.
The building was deficiently insulated for winter.
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Synonyms & Antonyms of deficient
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Common Phrases with deficient
deficient indeficient in
nutritionally deficientnutritionally deficient
deficient systemdeficient system
severely deficientseverely deficient
deficient supplydeficient supply
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Practice Question: deficient
Choose the best word for the blank
Many teenagers today are ___ in essential vitamins.
- A deficient
- B deficiency
- C deficit
- D deficiently
Answer: A) deficient — an adjective is needed as the subject complement after 'are'.