Unrighteous(ness)

is,

Not righteous; not just; not conformed in heart or life to the divine law; evil; wicked...
(Noah Webster's 1828)

Be ye not unequally yoked together
with unbelievers:
for what fellowship hath
righteousness with unrighteousness?
and what communion
hath light with darkness?

2 Corinthians 6:14