Absence of, or deviation from, just dealing; lack of rectitude or uprightness; gross injustice; unrighteousness; wickedness; as, the iniquity of bribery; the iniquity of an unjust judge.

An iniquitous act or thing; a deed of injustice or unrighteousness; a sin; a crime.

an unjust act

A character or personification in the old English moralities, or moral dramas, having the name sometimes of one vice and sometimes of another. See Vice.

absence of moral or spiritual values; "the powers of darkness"

morally objectionable behavior

Iniquity was a Danish death metal group. Established in 1989, the band released three full-length albums before parting ways in 2004. They are known by many in a more mainstream Internet environment as the band providing the soundtrack for the satirical flash animation "Growl Karaoke" in the form of the track The Bullet's Breath, off 2001's Grime.

a premeditated evil, one that you plan and you know that it is wrong and requires a blood offering

a mark on the inside

something that does not meet requirements; a condition of not being right