INEFFICIENTLY
inefficiently
(adverb) in an inefficient manner; “he dealt inefficiently with the crisis”
Source: WordNet® 3.1
Etymology
Adverb
inefficiently (comparative more inefficiently, superlative most inefficiently)
In an inefficient manner.
Source: Wiktionary
In`ef*fi"cient*ly, adv.
Definition: In an inefficient manner.
INEFFICIENT
In`ef*fi"cient, a.
1. Not efficient; not producing the effect intended or desired;
inefficacious; as, inefficient means or measures.
2. Incapable of, or indisposed to, effective action; habitually slack
or remiss; effecting little or nothing; as, inefficient workmen; an
inefficient administrator.
Source: Webster’s Unabridged Dictionary 1913 Edition