deficient

definition: inadequate in amount or degree
example: a deficient education
speech part: adjective
synonyms: lacking wanting
definition: falling short of some prescribed norm
example:
speech part: adjective
synonyms: inferior substandard
definition: of a quantity not able to fulfill a need or requirement
example:
speech part: adjective
synonyms: insufficient

deficient is explained and pronounced

How deficient is being used?