INADEQUATE
inadequate, unequal
(adjective) lacking the requisite qualities or resources to meet a task; “inadequate training”; “the staff was inadequate”; “she was unequal to the task”
inadequate, poor, short, jejune
(adjective) of insufficient quantity to meet a need; “an inadequate income”; “a poor salary”; “money is short”; “on short rations”; “food is in short supply”; “short on experience”; “the jejune diets of the very poor”
Source: WordNet® 3.1
Etymology
Adjective
inadequate (comparative more inadequate, superlative most inadequate)
Not adequate; not fit for the purpose
Synonyms: insufficient, deficient, Thesaurus:inadequate
Noun
inadequate (plural inadequates)
An individual who is inadequate.
Source: Wiktionary
In*ad"e*quate, a. Etym: [Pref. in- not + adequate: cf. F. inadéquat.]
Definition: Not adequate; unequal to the purpose; insufficient; deficient;
as, inadequate resources, power, conceptions, representations, etc.
Dryden.
– In*ad"e*quate*ly, adv.
– In*ad"e*quate*ness, n.
Source: Webster’s Unabridged Dictionary 1913 Edition