What is another word for deficient?

Need synonyms for deficient? Here's a list of words from our thesaurus that you can use instead.

Not coming up to an expected measure or meeting a particular need
“A diet deficient in vitamins.”
Insufficient or inadequate
“Similarly, she has not observed or complained about any deficient workmanship in the insulation and drywall and she believes that none exists with respect to her residence.”
Lacking some necessary part
“… a diet deficient in calcium can lead to weak bones.”
Falling short of a standard
“… woefully deficient eyesight kept him out of military service.”
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