INADEQUATELY
inadequately
(adverb) in an inadequate manner or to an inadequate degree; “the temporary camps were inadequately equipped”
Source: WordNet® 3.1
Etymology
Adverb
inadequately (comparative more inadequately, superlative most inadequately)
In an inadequate manner.
Antonyms
• adequately
Source: Wiktionary
INADEQUATE
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