What does deficient?

Answer 1

de·fi·cien·cy

dəˈfiSHənsē/

noun

noun: deficiency; plural noun: deficiencies

a lack or shortage.

"vitamin A deficiency in children"

synonyms: insufficiency, lack, shortage, want, dearth, inadequacy, deficit, shortfall; More scarcity, paucity, absence, deprivation, shortness

"a vitamin deficiency"

antonyms: surplus

a failing or shortcoming.

"they did not like having the deficiencies of their city pointed out to them"

synonyms: defect, fault, flaw, imperfection, weakness, weak point, inadequacy, shortcoming, limitation, failing