FAULTILY
faultily
(adverb) in an inaccurate manner; “these statements were faultily attributed to me”
Source: WordNet® 3.1
Etymology
Adverb
faultily (comparative more faultily, superlative most faultily)
In a faulty manner
Source: Wiktionary
Fault"i*ly, adv.
Definition: In a faulty manner.
FAULTY
Fault"y, a.
1. Containing faults, blemishes, or defects; imperfect; not fit for
the use intended.
Created once So goodly and erect, though faulty since. Milton.
2. Guilty of a fault, or of faults; hence, blamable; worthy of
censure. Shak.
The king doth speak . . . as one which is faulty. 2 Sam. xiv. 13.
Source: Webster’s Unabridged Dictionary 1913 Edition